diff --git a/doc/api-version-switch-zh.md b/doc/api-version-switch-zh.md
new file mode 100644
index 0000000..2f181c2
--- /dev/null
+++ b/doc/api-version-switch-zh.md
@@ -0,0 +1,74 @@
+# API 版本分流接入指南（`api-header`）
+
+## 目标
+- 通过请求头 `api-header` 动态选择不同 Handler（如 `001Handler` / `002Handler`）。
+- 让旧 App 无需升级仍可走旧逻辑，新 App 通过版本头走新逻辑。
+
+## 当前规则
+- 仅识别请求头：`api-header`
+- 严格版本格式：`x.y.z` 或 `vx.y.z`
+- 仅当 `api-header > 1.0.0` 时走新逻辑（V2）
+- 其余情况（缺失/非法/`<=1.0.0`）走旧逻辑（V1）
+
+相关代码：
+- 版本解析：`pkg/apiversion/version.go`
+- 版本注入中间件：`internal/middleware/apiVersionMiddleware.go`
+- 通用分流器：`internal/middleware/apiVersionSwitchHandler.go`
+
+## 新接口接入步骤（推荐）
+
+### 1) 实现两个 Handler
+```go
+func FooV1Handler(svcCtx *svc.ServiceContext) gin.HandlerFunc {
+	return func(c *gin.Context) {
+		// 旧逻辑（001）
+	}
+}
+
+func FooV2Handler(svcCtx *svc.ServiceContext) gin.HandlerFunc {
+	return func(c *gin.Context) {
+		// 新逻辑（002）
+	}
+}
+```
+
+### 2) 在路由中挂分流器
+```go
+group.POST("/foo", middleware.ApiVersionSwitchHandler(
+	foo.FooV1Handler(serverCtx),
+	foo.FooV2Handler(serverCtx),
+))
+```
+
+完成后，无需在业务代码里手写 `api-header` 判断。
+
+## 客户端调用示例
+
+### 旧逻辑（V1）
+```bash
+curl -X POST 'https://example.com/v1/common/foo' \
+  -H 'Content-Type: application/json' \
+  -d '{"x":1}'
+```
+
+### 新逻辑（V2）
+```bash
+curl -X POST 'https://example.com/v1/common/foo' \
+  -H 'Content-Type: application/json' \
+  -H 'api-header: 1.0.1' \
+  -d '{"x":1}'
+```
+
+## 测试建议（最小集）
+- 无 `api-header`：命中 V1
+- `api-header: 1.0.0`：命中 V1
+- `api-header: 1.0.1`：命中 V2
+- `api-header: abc`：命中 V1
+
+可参考测试：
+- `internal/middleware/apiVersionSwitchHandler_test.go`
+
+## 适用建议
+- 差异较小：优先在 V2 中复用现有逻辑，减少重复代码。
+- 差异较大：拆分 V1/V2 各自逻辑，避免分支污染。
+- 上线顺序：先发后端分流能力，再逐步让客户端加 `api-header`。
diff --git a/internal/handler/auth/checkCodeLegacyHandler.go b/internal/handler/auth/checkCodeLegacyHandler.go
index 87db15c..88679ea 100644
--- a/internal/handler/auth/checkCodeLegacyHandler.go
+++ b/internal/handler/auth/checkCodeLegacyHandler.go
@@ -11,6 +11,18 @@ import (
 
 // Check legacy verification code
 func CheckCodeLegacyHandler(svcCtx *svc.ServiceContext) func(c *gin.Context) {
+	return CheckCodeLegacyV1Handler(svcCtx)
+}
+
+func CheckCodeLegacyV1Handler(svcCtx *svc.ServiceContext) func(c *gin.Context) {
+	return checkCodeLegacyHandler(svcCtx, false)
+}
+
+func CheckCodeLegacyV2Handler(svcCtx *svc.ServiceContext) func(c *gin.Context) {
+	return checkCodeLegacyHandler(svcCtx, true)
+}
+
+func checkCodeLegacyHandler(svcCtx *svc.ServiceContext, consume bool) func(c *gin.Context) {
 	return func(c *gin.Context) {
 		var req types.LegacyCheckVerificationCodeRequest
 		_ = c.ShouldBind(&req)
@@ -27,14 +39,9 @@ func CheckCodeLegacyHandler(svcCtx *svc.ServiceContext) func(c *gin.Context) {
 		}
 
 		l := commonLogic.NewCheckVerificationCodeLogic(c.Request.Context(), svcCtx)
-		useLatest := false
-		if value, ok := c.Request.Context().Value(constant.CtxKeyAPIVersionUseLatest).(bool); ok {
-			useLatest = value
-		}
-
 		resp, err := l.CheckVerificationCodeWithBehavior(normalizedReq, commonLogic.VerifyCodeCheckBehavior{
 			Source:             "legacy",
-			Consume:            useLatest,
+			Consume:            consume,
 			LegacyType3Mapped:  legacyType3Mapped,
 			AllowSceneFallback: constant.ParseVerifyType(normalizedReq.Type) != constant.DeleteAccount,
 		})
diff --git a/internal/handler/auth/checkCodeLegacyHandler_test.go b/internal/handler/auth/checkCodeLegacyHandler_test.go
index c6c0b0c..cde2a35 100644
--- a/internal/handler/auth/checkCodeLegacyHandler_test.go
+++ b/internal/handler/auth/checkCodeLegacyHandler_test.go
@@ -33,7 +33,10 @@ func newLegacyCheckCodeTestRouter(svcCtx *svc.ServiceContext) *gin.Engine {
 	gin.SetMode(gin.TestMode)
 	router := gin.New()
 	router.Use(middleware.ApiVersionMiddleware(svcCtx))
-	router.POST("/v1/auth/check-code", CheckCodeLegacyHandler(svcCtx))
+	router.POST("/v1/auth/check-code", middleware.ApiVersionSwitchHandler(
+		CheckCodeLegacyV1Handler(svcCtx),
+		CheckCodeLegacyV2Handler(svcCtx),
+	))
 	return router
 }
 
diff --git a/internal/handler/common/checkverificationcodehandler.go b/internal/handler/common/checkverificationcodehandler.go
index 1d2ffee..542defd 100644
--- a/internal/handler/common/checkverificationcodehandler.go
+++ b/internal/handler/common/checkverificationcodehandler.go
@@ -5,12 +5,23 @@ import (
 	"github.com/perfect-panel/server/internal/logic/common"
 	"github.com/perfect-panel/server/internal/svc"
 	"github.com/perfect-panel/server/internal/types"
-	"github.com/perfect-panel/server/pkg/constant"
 	"github.com/perfect-panel/server/pkg/result"
 )
 
 // Check verification code
 func CheckVerificationCodeHandler(svcCtx *svc.ServiceContext) func(c *gin.Context) {
+	return CheckVerificationCodeV1Handler(svcCtx)
+}
+
+func CheckVerificationCodeV1Handler(svcCtx *svc.ServiceContext) func(c *gin.Context) {
+	return checkVerificationCodeHandler(svcCtx, false)
+}
+
+func CheckVerificationCodeV2Handler(svcCtx *svc.ServiceContext) func(c *gin.Context) {
+	return checkVerificationCodeHandler(svcCtx, true)
+}
+
+func checkVerificationCodeHandler(svcCtx *svc.ServiceContext, consume bool) func(c *gin.Context) {
 	return func(c *gin.Context) {
 		var req types.CheckVerificationCodeRequest
 		_ = c.ShouldBind(&req)
@@ -21,14 +32,9 @@ func CheckVerificationCodeHandler(svcCtx *svc.ServiceContext) func(c *gin.Contex
 		}
 
 		l := common.NewCheckVerificationCodeLogic(c.Request.Context(), svcCtx)
-		useLatest := false
-		if value, ok := c.Request.Context().Value(constant.CtxKeyAPIVersionUseLatest).(bool); ok {
-			useLatest = value
-		}
-
 		resp, err := l.CheckVerificationCodeWithBehavior(&req, common.VerifyCodeCheckBehavior{
 			Source:  "canonical",
-			Consume: useLatest,
+			Consume: consume,
 		})
 		result.HttpResult(c, resp, err)
 	}
diff --git a/internal/handler/common/checkverificationcodehandler_test.go b/internal/handler/common/checkverificationcodehandler_test.go
index 721e0b5..511bc79 100644
--- a/internal/handler/common/checkverificationcodehandler_test.go
+++ b/internal/handler/common/checkverificationcodehandler_test.go
@@ -55,7 +55,10 @@ func newCanonicalCheckCodeTestRouter(svcCtx *svc.ServiceContext) *gin.Engine {
 	gin.SetMode(gin.TestMode)
 	router := gin.New()
 	router.Use(middleware.ApiVersionMiddleware(svcCtx))
-	router.POST("/v1/common/check_verification_code", CheckVerificationCodeHandler(svcCtx))
+	router.POST("/v1/common/check_verification_code", middleware.ApiVersionSwitchHandler(
+		CheckVerificationCodeV1Handler(svcCtx),
+		CheckVerificationCodeV2Handler(svcCtx),
+	))
 	return router
 }
 
diff --git a/internal/handler/public/user/deleteAccountHandler.go b/internal/handler/public/user/deleteAccountHandler.go
index 1bb6383..c33514b 100644
--- a/internal/handler/public/user/deleteAccountHandler.go
+++ b/internal/handler/public/user/deleteAccountHandler.go
@@ -2,15 +2,14 @@ package user
 
 import (
 	"context"
-	"encoding/json"
-	"fmt"
 	"strings"
-	"time"
 
 	"github.com/gin-gonic/gin"
-	"github.com/perfect-panel/server/internal/config"
+	commonLogic "github.com/perfect-panel/server/internal/logic/common"
 	"github.com/perfect-panel/server/internal/logic/public/user"
 	"github.com/perfect-panel/server/internal/svc"
+	"github.com/perfect-panel/server/internal/types"
+	"github.com/perfect-panel/server/pkg/authmethod"
 	"github.com/perfect-panel/server/pkg/constant"
 	"github.com/perfect-panel/server/pkg/result"
 	"github.com/perfect-panel/server/pkg/xerr"
@@ -36,7 +35,7 @@ func DeleteAccountHandler(serverCtx *svc.ServiceContext) gin.HandlerFunc {
 		// 统一处理邮箱格式：转小写并去空格，与发送验证码逻辑保持一致
 		req.Email = strings.ToLower(strings.TrimSpace(req.Email))
 
-		// 校验邮箱验证码
+		// 校验邮箱验证码（统一走公共验证码校验器，支持 delete_account/security 场景兼容）
 		if err := verifyEmailCode(c.Request.Context(), serverCtx, req.Email, req.Code); err != nil {
 			result.HttpResult(c, nil, err)
 			return
@@ -48,43 +47,29 @@ func DeleteAccountHandler(serverCtx *svc.ServiceContext) gin.HandlerFunc {
 	}
 }
 
-// CacheKeyPayload 验证码缓存结构
-type CacheKeyPayload struct {
-	Code   string `json:"code"`
-	LastAt int64  `json:"lastAt"`
-}
-
 // verifyEmailCode 校验邮箱验证码
-// 支持 DeleteAccount 和 Security 两种场景的验证码
+// 1. 统一复用 common checker
+// 2. 强制 consume=true（最终业务操作做一次性消费）
+// 3. 兼容历史 security 场景验证码（allow fallback）
 func verifyEmailCode(ctx context.Context, serverCtx *svc.ServiceContext, email string, code string) error {
-	// 尝试多种场景的验证码
-	scenes := []string{constant.DeleteAccount.String(), constant.Security.String()}
-	var verified bool
-	var cacheKeyUsed string
-	var payload CacheKeyPayload
-
-	for _, scene := range scenes {
-		cacheKey := fmt.Sprintf("%s:%s:%s", config.AuthCodeCacheKey, scene, email)
-		value, err := serverCtx.Redis.Get(ctx, cacheKey).Result()
-		if err != nil || value == "" {
-			continue
-		}
-		if err := json.Unmarshal([]byte(value), &payload); err != nil {
-			continue
-		}
-		// 检查验证码是否匹配且未过期
-		if payload.Code == code && time.Now().Unix()-payload.LastAt <= serverCtx.Config.VerifyCode.VerifyCodeExpireTime {
-			verified = true
-			cacheKeyUsed = cacheKey
-			break
-		}
+	l := commonLogic.NewCheckVerificationCodeLogic(ctx, serverCtx)
+	resp, err := l.CheckVerificationCodeWithBehavior(&types.CheckVerificationCodeRequest{
+		Method:  authmethod.Email,
+		Account: email,
+		Code:    strings.TrimSpace(code),
+		Type:    uint8(constant.DeleteAccount),
+	}, commonLogic.VerifyCodeCheckBehavior{
+		Source:             "delete_account",
+		Consume:            true,
+		AllowSceneFallback: true,
+	})
+	if err != nil {
+		return err
 	}
 
-	if !verified {
+	if resp == nil || !resp.Status {
 		return errors.Wrapf(xerr.NewErrCode(xerr.VerifyCodeError), "verification code error or expired")
 	}
 
-	// 验证成功后删除缓存
-	serverCtx.Redis.Del(ctx, cacheKeyUsed)
 	return nil
 }
diff --git a/internal/handler/public/user/deleteAccountHandler_test.go b/internal/handler/public/user/deleteAccountHandler_test.go
index d66fe41..345227d 100644
--- a/internal/handler/public/user/deleteAccountHandler_test.go
+++ b/internal/handler/public/user/deleteAccountHandler_test.go
@@ -5,14 +5,18 @@ import (
 	"context"
 	"encoding/json"
 	"errors"
+	"fmt"
 	"net"
 	"net/http"
 	"net/http/httptest"
 	"testing"
+	"time"
 
+	"github.com/alicebob/miniredis/v2"
 	"github.com/gin-gonic/gin"
 	"github.com/perfect-panel/server/internal/config"
 	"github.com/perfect-panel/server/internal/svc"
+	"github.com/perfect-panel/server/pkg/constant"
 	"github.com/redis/go-redis/v9"
 )
 
@@ -100,3 +104,89 @@ func TestDeleteAccountHandlerVerifyCodeErrorUsesUnifiedResponse(t *testing.T) {
 		t.Fatalf("expected business code 70001, got %d, body=%s", resp.Code, recorder.Body.String())
 	}
 }
+
+func TestVerifyEmailCode_DeleteAccountSceneConsume(t *testing.T) {
+	miniRedis := miniredis.RunT(t)
+	redisClient := redis.NewClient(&redis.Options{Addr: miniRedis.Addr()})
+	t.Cleanup(func() {
+		redisClient.Close()
+		miniRedis.Close()
+	})
+
+	serverCtx := &svc.ServiceContext{
+		Redis: redisClient,
+		Config: config.Config{
+			VerifyCode: config.VerifyCode{VerifyCodeExpireTime: 900},
+		},
+	}
+
+	email := "delete-account@example.com"
+	code := "112233"
+	cacheKey := seedDeleteSceneCode(t, redisClient, constant.DeleteAccount.String(), email, code)
+
+	err := verifyEmailCode(context.Background(), serverCtx, email, code)
+	if err != nil {
+		t.Fatalf("verifyEmailCode returned unexpected error: %v", err)
+	}
+
+	exists, err := redisClient.Exists(context.Background(), cacheKey).Result()
+	if err != nil {
+		t.Fatalf("failed to check redis key: %v", err)
+	}
+	if exists != 0 {
+		t.Fatalf("expected verification code to be consumed, key still exists")
+	}
+}
+
+func TestVerifyEmailCode_SecurityFallbackConsume(t *testing.T) {
+	miniRedis := miniredis.RunT(t)
+	redisClient := redis.NewClient(&redis.Options{Addr: miniRedis.Addr()})
+	t.Cleanup(func() {
+		redisClient.Close()
+		miniRedis.Close()
+	})
+
+	serverCtx := &svc.ServiceContext{
+		Redis: redisClient,
+		Config: config.Config{
+			VerifyCode: config.VerifyCode{VerifyCodeExpireTime: 900},
+		},
+	}
+
+	email := "security-fallback@example.com"
+	code := "445566"
+	cacheKey := seedDeleteSceneCode(t, redisClient, constant.Security.String(), email, code)
+
+	err := verifyEmailCode(context.Background(), serverCtx, email, code)
+	if err != nil {
+		t.Fatalf("verifyEmailCode fallback returned unexpected error: %v", err)
+	}
+
+	exists, err := redisClient.Exists(context.Background(), cacheKey).Result()
+	if err != nil {
+		t.Fatalf("failed to check redis key: %v", err)
+	}
+	if exists != 0 {
+		t.Fatalf("expected fallback verification code to be consumed, key still exists")
+	}
+}
+
+func seedDeleteSceneCode(t *testing.T, redisClient *redis.Client, scene string, email string, code string) string {
+	t.Helper()
+
+	cacheKey := fmt.Sprintf("%s:%s:%s", config.AuthCodeCacheKey, scene, email)
+	payload := map[string]interface{}{
+		"code":   code,
+		"lastAt": time.Now().Unix(),
+	}
+	payloadRaw, err := json.Marshal(payload)
+	if err != nil {
+		t.Fatalf("failed to marshal payload: %v", err)
+	}
+	err = redisClient.Set(context.Background(), cacheKey, payloadRaw, time.Minute*15).Err()
+	if err != nil {
+		t.Fatalf("failed to seed redis payload: %v", err)
+	}
+
+	return cacheKey
+}
diff --git a/internal/handler/routes.go b/internal/handler/routes.go
index 3d18628..16c9250 100644
--- a/internal/handler/routes.go
+++ b/internal/handler/routes.go
@@ -636,7 +636,10 @@ func RegisterHandlers(router *gin.Engine, serverCtx *svc.ServiceContext) {
 		authGroupRouter.GET("/check/telephone", auth.CheckUserTelephoneHandler(serverCtx))
 
 		// Check legacy verification code
-		authGroupRouter.POST("/check-code", auth.CheckCodeLegacyHandler(serverCtx))
+		authGroupRouter.POST("/check-code", middleware.ApiVersionSwitchHandler(
+			auth.CheckCodeLegacyV1Handler(serverCtx),
+			auth.CheckCodeLegacyV2Handler(serverCtx),
+		))
 
 		// User login
 		authGroupRouter.POST("/login", auth.UserLoginHandler(serverCtx))
@@ -684,7 +687,10 @@ func RegisterHandlers(router *gin.Engine, serverCtx *svc.ServiceContext) {
 		commonGroupRouter.GET("/ads", common.GetAdsHandler(serverCtx))
 
 		// Check verification code
-		commonGroupRouter.POST("/check_verification_code", common.CheckVerificationCodeHandler(serverCtx))
+		commonGroupRouter.POST("/check_verification_code", middleware.ApiVersionSwitchHandler(
+			common.CheckVerificationCodeV1Handler(serverCtx),
+			common.CheckVerificationCodeV2Handler(serverCtx),
+		))
 
 		// Get Client
 		commonGroupRouter.GET("/client", common.GetClientHandler(serverCtx))
diff --git a/internal/logic/common/verifyCodeChecker.go b/internal/logic/common/verifyCodeChecker.go
index 4cfaee9..577e371 100644
--- a/internal/logic/common/verifyCodeChecker.go
+++ b/internal/logic/common/verifyCodeChecker.go
@@ -205,6 +205,9 @@ func resolveVerifyScenes(verifyType constant.VerifyType, allowFallback bool) []s
 		}
 		return []string{constant.Security.String()}
 	case constant.DeleteAccount:
+		if allowFallback {
+			return []string{constant.DeleteAccount.String(), constant.Security.String()}
+		}
 		return []string{constant.DeleteAccount.String()}
 	default:
 		return nil
diff --git a/internal/middleware/apiVersionSwitchHandler.go b/internal/middleware/apiVersionSwitchHandler.go
new file mode 100644
index 0000000..ec1633e
--- /dev/null
+++ b/internal/middleware/apiVersionSwitchHandler.go
@@ -0,0 +1,23 @@
+package middleware
+
+import (
+	"net/http"
+
+	"github.com/gin-gonic/gin"
+	"github.com/perfect-panel/server/pkg/constant"
+)
+
+func ApiVersionSwitchHandler(legacyHandler gin.HandlerFunc, latestHandler gin.HandlerFunc) gin.HandlerFunc {
+	return func(c *gin.Context) {
+		useLatest, _ := c.Request.Context().Value(constant.CtxKeyAPIVersionUseLatest).(bool)
+		if useLatest && latestHandler != nil {
+			latestHandler(c)
+			return
+		}
+		if legacyHandler != nil {
+			legacyHandler(c)
+			return
+		}
+		c.AbortWithStatus(http.StatusNotFound)
+	}
+}
diff --git a/internal/middleware/apiVersionSwitchHandler_test.go b/internal/middleware/apiVersionSwitchHandler_test.go
new file mode 100644
index 0000000..dd48dc6
--- /dev/null
+++ b/internal/middleware/apiVersionSwitchHandler_test.go
@@ -0,0 +1,50 @@
+package middleware
+
+import (
+	"context"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/gin-gonic/gin"
+	"github.com/perfect-panel/server/pkg/constant"
+)
+
+func TestApiVersionSwitchHandlerUsesLegacyByDefault(t *testing.T) {
+	gin.SetMode(gin.TestMode)
+	r := gin.New()
+	r.GET("/test", ApiVersionSwitchHandler(
+		func(c *gin.Context) { c.String(http.StatusOK, "legacy") },
+		func(c *gin.Context) { c.String(http.StatusOK, "latest") },
+	))
+
+	req := httptest.NewRequest(http.MethodGet, "/test", nil)
+	resp := httptest.NewRecorder()
+	r.ServeHTTP(resp, req)
+
+	if resp.Code != http.StatusOK || resp.Body.String() != "legacy" {
+		t.Fatalf("expected legacy handler, code=%d body=%s", resp.Code, resp.Body.String())
+	}
+}
+
+func TestApiVersionSwitchHandlerUsesLatestWhenFlagSet(t *testing.T) {
+	gin.SetMode(gin.TestMode)
+	r := gin.New()
+	r.Use(func(c *gin.Context) {
+		ctx := context.WithValue(c.Request.Context(), constant.CtxKeyAPIVersionUseLatest, true)
+		c.Request = c.Request.WithContext(ctx)
+		c.Next()
+	})
+	r.GET("/test", ApiVersionSwitchHandler(
+		func(c *gin.Context) { c.String(http.StatusOK, "legacy") },
+		func(c *gin.Context) { c.String(http.StatusOK, "latest") },
+	))
+
+	req := httptest.NewRequest(http.MethodGet, "/test", nil)
+	resp := httptest.NewRecorder()
+	r.ServeHTTP(resp, req)
+
+	if resp.Code != http.StatusOK || resp.Body.String() != "latest" {
+		t.Fatalf("expected latest handler, code=%d body=%s", resp.Code, resp.Body.String())
+	}
+}