diff --git a/backend/src/logic4country/delete.go b/backend/src/logic4country/delete.go
index 7ba90fd..3ce4909 100644
--- a/backend/src/logic4country/delete.go
+++ b/backend/src/logic4country/delete.go
@@ -137,6 +137,26 @@ func DeleteHandler(c *gin.Context) {
 		return
 	}
 
+	// 新增：3.4 更新flag表（软删除国旗信息）
+	_, err = tx.Exec("UPDATE country_flag SET deleted = TRUE WHERE country_id = $1", req.CountryID)
+	if err != nil {
+		tx.Rollback()
+		zap.L().Error("❌ country_flag表更新失败",
+			zap.String("req_id", reqID),
+			zap.String("country_id", req.CountryID),
+			zap.Error(err),
+		)
+		c.JSON(http.StatusInternalServerError, DeleteResponse{
+			Success: false,
+			Message: "删除国旗信息失败",
+		})
+		return
+	}
+	zap.L().Debug("📝 flag表软删除成功",
+		zap.String("req_id", reqID),
+		zap.String("country_id", req.CountryID),
+	)
+
 	// 提交事务
 	if err := tx.Commit(); err != nil {
 		tx.Rollback()
@@ -165,4 +185,4 @@ func DeleteHandler(c *gin.Context) {
 		Success: true,
 		Message: "删除成功",
 	})
-}
+}
\ No newline at end of file