diff --git a/apis/node/node.api b/apis/node/node.api
index 9313aca..e028a37 100644
--- a/apis/node/node.api
+++ b/apis/node/node.api
@@ -64,6 +64,8 @@ type (
 	ServerUser {
 		Id          int64  `json:"id"`
 		UUID        string `json:"uuid"`
+		// SpeedLimit 单位为 Mbps，0 表示不限速。
+		// 节点端 (V2bX/XrayR 等) 按 Mbps 解释该值，服务端透传不做单位换算。
 		SpeedLimit  int64  `json:"speed_limit"`
 		DeviceLimit int64  `json:"device_limit"`
 	}
diff --git a/internal/logic/server/getServerUserListLogic.go b/internal/logic/server/getServerUserListLogic.go
index 80bc085..625595a 100644
--- a/internal/logic/server/getServerUserListLogic.go
+++ b/internal/logic/server/getServerUserListLogic.go
@@ -258,13 +258,13 @@ func (l *GetServerUserListLogic) GetServerUserList(req *types.GetServerUserListR
 		}
 	}
 
-	// 处理过期订阅用户：如果当前节点属于过期节点组，添加符合条件的过期用户
+	// 处理过期订阅用户：如果当前节点属于过期节点组，添加符合条件的过期用户。
+	// 用户级 speed_limit (user_subscribe.speed_limit) 与过期节点组 speed_limit
+	// 取更严格的一个 — 0 视为"无限制"，正值优先于 0。
 	if len(nodeGroupIds) > 0 {
 		expiredUsers, expiredSpeedLimit := l.getExpiredUsers(nodeGroupIds)
 		for i := range expiredUsers {
-			if expiredSpeedLimit > 0 {
-				expiredUsers[i].SpeedLimit = expiredSpeedLimit
-			}
+			expiredUsers[i].SpeedLimit = mergeSpeedLimit(expiredUsers[i].SpeedLimit, expiredSpeedLimit)
 		}
 		users = append(users, expiredUsers...)
 	}
@@ -369,14 +369,34 @@ func (l *GetServerUserListLogic) getExpiredUsers(serverNodeGroupIds []int64) ([]
 		}
 		seen[userSub.Id] = true
 		users = append(users, types.ServerUser{
-			Id:   userSub.Id,
-			UUID: userSub.UUID,
+			Id:         userSub.Id,
+			UUID:       userSub.UUID,
+			SpeedLimit: userSub.SpeedLimit,
 		})
 	}
 
 	return users, int64(expiredGroup.SpeedLimit)
 }
 
+// mergeSpeedLimit 返回两个速度限制（Mbps）中更严格的一个。
+// 0 视为"无限制"，因此会被任意正值覆盖；都为 0 时返回 0。
+// 用于用户级 speed_limit 与节点组级 speed_limit 的合并：
+//   - both 0 → 0 (不限速)
+//   - 仅一个 > 0 → 取该值
+//   - both > 0 → 取较小者（更严格）
+func mergeSpeedLimit(a, b int64) int64 {
+	if a <= 0 {
+		return b
+	}
+	if b <= 0 {
+		return a
+	}
+	if a < b {
+		return a
+	}
+	return b
+}
+
 func (l *GetServerUserListLogic) checkExpiredUserEligibility(userSub *user.Subscribe, expiredGroup *group.NodeGroup) bool {
 	expiredDays := int(time.Since(userSub.ExpireTime).Hours() / 24)
 	if expiredDays > expiredGroup.ExpiredDaysLimit {
diff --git a/internal/logic/server/getServerUserListLogic_test.go b/internal/logic/server/getServerUserListLogic_test.go
index 2744b3f..47a1d79 100644
--- a/internal/logic/server/getServerUserListLogic_test.go
+++ b/internal/logic/server/getServerUserListLogic_test.go
@@ -338,3 +338,32 @@ func httptestNewRequest() *http.Request {
 	req, _ := http.NewRequestWithContext(context.Background(), http.MethodGet, "/v1/server/user", nil)
 	return req
 }
+
+// TestMergeSpeedLimit 验证用户级 speed_limit 与过期节点组 speed_limit 合并规则：
+// 0 = 不限制 (loses)，正值优先；都为正取较小者（更严格）。
+// 这是 user-dimension 限速在过期节点组分支下能生效的关键。
+func TestMergeSpeedLimit(t *testing.T) {
+	cases := []struct {
+		name string
+		a    int64
+		b    int64
+		want int64
+	}{
+		{"both zero stays zero", 0, 0, 0},
+		{"a positive b zero takes a", 30, 0, 30},
+		{"a zero b positive takes b", 0, 50, 50},
+		{"a negative treated as zero takes b", -1, 50, 50},
+		{"b negative treated as zero takes a", 50, -1, 50},
+		{"both positive takes smaller (a<b)", 20, 50, 20},
+		{"both positive takes smaller (b<a)", 80, 30, 30},
+		{"equal positive returns same value", 25, 25, 25},
+	}
+
+	for _, tc := range cases {
+		t.Run(tc.name, func(t *testing.T) {
+			if got := mergeSpeedLimit(tc.a, tc.b); got != tc.want {
+				t.Fatalf("mergeSpeedLimit(%d, %d) = %d, want %d", tc.a, tc.b, got, tc.want)
+			}
+		})
+	}
+}
diff --git a/internal/model/group/node_group.go b/internal/model/group/node_group.go
index a2fe3ee..13750fa 100644
--- a/internal/model/group/node_group.go
+++ b/internal/model/group/node_group.go
@@ -16,7 +16,10 @@ type NodeGroup struct {
 	IsExpiredGroup      *bool     `gorm:"default:false;not null;index:idx_is_expired_group;comment:Is Expired Group"`
 	ExpiredDaysLimit    int       `gorm:"default:7;not null;comment:Expired days limit (days)"`
 	MaxTrafficGBExpired *int64    `gorm:"default:0;comment:Max traffic for expired users (GB)"`
-	SpeedLimit          int       `gorm:"default:0;not null;comment:Speed limit (KB/s)"`
+	// SpeedLimit: 过期节点组对其内用户施加的速度上限。
+	// 实际下发节点的字段为 ServerUser.SpeedLimit (Mbps)，二者直接透传，无单位换算。
+	// 注：早期 schema 注释写作 KB/s 系笔误，真实语义与 user_subscribe.speed_limit / subscribe.speed_limit 一致，均为 Mbps。
+	SpeedLimit          int       `gorm:"default:0;not null;comment:Speed limit (Mbps); 0 means no limit"`
 	MinTrafficGB        *int64    `gorm:"default:0;comment:Minimum Traffic (GB) for this node group"`
 	MaxTrafficGB        *int64    `gorm:"default:0;comment:Maximum Traffic (GB) for this node group"`
 	CreatedAt           time.Time `gorm:"<-:create;comment:Create Time"`