diff --git a/web-api/ruoyi-admin/src/main/java/com/ruoyi/api/CosController.java b/web-api/ruoyi-admin/src/main/java/com/ruoyi/api/CosController.java
index d188e10..470f9fa 100644
--- a/web-api/ruoyi-admin/src/main/java/com/ruoyi/api/CosController.java
+++ b/web-api/ruoyi-admin/src/main/java/com/ruoyi/api/CosController.java
@@ -1,6 +1,7 @@
 package com.ruoyi.api;
 
 import com.ruoyi.common.core.domain.AjaxResult;
+import com.ruoyi.common.utils.StringUtils;
 import com.ruoyi.common.utils.TencentCosUtil;
 import io.swagger.annotations.Api;
 import io.swagger.annotations.ApiOperation;
@@ -28,11 +29,16 @@ public class CosController {
     @PostMapping("/upload")
     public AjaxResult upload(
             @ApiParam(name = "file", value = "文件", required = true)
-            @RequestParam("file") MultipartFile file) throws Exception {
-        String uploadUrl = tencentCosUtil.uploadMultipartFile(file, true);
+            @RequestParam("file") MultipartFile file,
+            @ApiParam(name = "prefix", value = "路径前缀（如asset）", required = false)
+            @RequestParam(value = "prefix", required = false) String prefix) throws Exception {
+        String uploadUrl = tencentCosUtil.uploadMultipartFile(file, true, prefix);
         AjaxResult ajax = AjaxResult.success(uploadUrl);
         ajax.put("url", uploadUrl);
         ajax.put("oldName", file.getOriginalFilename());
+        if (StringUtils.isNotBlank(prefix)) {
+            ajax.put("prefix", prefix);
+        }
         return ajax;
     }
 }
diff --git a/web-api/ruoyi-admin/src/main/java/com/ruoyi/api/FileController.java b/web-api/ruoyi-admin/src/main/java/com/ruoyi/api/FileController.java
index 2dcc9bb..1a76d97 100644
--- a/web-api/ruoyi-admin/src/main/java/com/ruoyi/api/FileController.java
+++ b/web-api/ruoyi-admin/src/main/java/com/ruoyi/api/FileController.java
@@ -1,6 +1,7 @@
 package com.ruoyi.api;
 
 import com.ruoyi.common.core.domain.AjaxResult;
+import com.ruoyi.common.utils.StringUtils;
 import com.ruoyi.common.utils.TencentCosUtil;
 import io.swagger.annotations.Api;
 import io.swagger.annotations.ApiOperation;
@@ -21,17 +22,25 @@ public class FileController {
     private final TencentCosUtil tencentCosUtil;
 
     /**
-     * 文件上传
+     * 文件上传（支持prefix路径前缀）
      */
-
     @ApiOperation(value = "文件上传")
     @PostMapping("/upload")
     public AjaxResult upload(
             @ApiParam(name = "file", value = "文件", required = true)
-            @RequestParam("file") MultipartFile file) throws Exception {
+            @RequestParam("file") MultipartFile file,
+            @ApiParam(name = "prefix", value = "路径前缀（如asset、generated等）", required = false)
+            @RequestParam(value = "prefix", required = false) String prefix) throws Exception {
+        
         AjaxResult ajax = AjaxResult.success();
-        String uploadUrl = tencentCosUtil.uploadMultipartFile(file, true);
+        String uploadUrl = tencentCosUtil.uploadMultipartFile(file, true, prefix);
+        
         ajax.put("url", uploadUrl);
+        ajax.put("oldName", file.getOriginalFilename());
+        if (StringUtils.isNotBlank(prefix)) {
+            ajax.put("prefix", prefix);
+        }
+        
         return ajax;
     }
 
diff --git a/web-api/ruoyi-admin/src/main/java/com/ruoyi/web/controller/common/CommonController.java b/web-api/ruoyi-admin/src/main/java/com/ruoyi/web/controller/common/CommonController.java
index 0f2ff29..9277e82 100644
--- a/web-api/ruoyi-admin/src/main/java/com/ruoyi/web/controller/common/CommonController.java
+++ b/web-api/ruoyi-admin/src/main/java/com/ruoyi/web/controller/common/CommonController.java
@@ -142,16 +142,20 @@ public class CommonController {
     }
 
     @PostMapping("/cos/upload")
-    public AjaxResult uploadCover(MultipartFile file) {
+    public AjaxResult uploadCover(MultipartFile file,
+                                  @RequestParam(value = "prefix", required = false) String prefix) {
         AjaxResult ajax = AjaxResult.success();
         String uploadUrl;
         try {
-            uploadUrl = tencentCosUtil.upload(file);
+            uploadUrl = tencentCosUtil.uploadMultipartFile(file, true, prefix);
         } catch (Exception e) {
             throw new BaseException("上传失败");
         }
         ajax.put("url", uploadUrl);
         ajax.put("oldName", file.getOriginalFilename());
+        if (StringUtils.isNotBlank(prefix)) {
+            ajax.put("prefix", prefix);
+        }
         return ajax;
     }
 
diff --git a/web-api/ruoyi-common/src/main/java/com/ruoyi/common/utils/TencentCosUtil.java b/web-api/ruoyi-common/src/main/java/com/ruoyi/common/utils/TencentCosUtil.java
index 5a27fde..a59910f 100644
--- a/web-api/ruoyi-common/src/main/java/com/ruoyi/common/utils/TencentCosUtil.java
+++ b/web-api/ruoyi-common/src/main/java/com/ruoyi/common/utils/TencentCosUtil.java
@@ -60,7 +60,14 @@ public class TencentCosUtil {
      * 与AwsS3Util.uploadMultipartFile方法接口兼容
      */
     public String upload(MultipartFile file) throws Exception {
-        return uploadMultipartFile(file, true);
+        return uploadMultipartFile(file, true, null);
+    }
+
+    /**
+     * 兼容原有调用（保留双参数版本）
+     */
+    public String uploadMultipartFile(MultipartFile file, boolean isPublic) throws Exception {
+        return uploadMultipartFile(file, isPublic, null);
     }
 
     /**
@@ -68,15 +75,16 @@ public class TencentCosUtil {
      *
      * @param file     前端上传的MultipartFile
      * @param isPublic 是否公开访问（当前实现中忽略，使用domain配置）
+     * @param prefix   自定义路径前缀（如 "asset"），null或空时不添加前缀
      * @return 文件访问地址（URL字符串）
      */
-    public String uploadMultipartFile(MultipartFile file, boolean isPublic) throws Exception {
+    public String uploadMultipartFile(MultipartFile file, boolean isPublic, String prefix) throws Exception {
         if (file.isEmpty()) {
             throw new IllegalArgumentException("上传文件不能为空");
         }
 
-        // 生成唯一文件键，格式与AWS一致：yyyy/MM/dd/uuid_filename
-        String key = generateCosKey(file.getOriginalFilename());
+        // 生成唯一文件键，支持prefix参数
+        String key = generateCosKey(file.getOriginalFilename(), prefix);
 
         try {
             InputStream inputStream = file.getInputStream();
@@ -145,11 +153,20 @@ public class TencentCosUtil {
     }
 
     /**
-     * 生成COS文件键，与AWS保持一致的命名格式
+     * 生成COS文件键，支持prefix前缀
+     * prefix=asset → asset/yyyy/MM/dd/xxxxxxxx_filename
+     * prefix=null或空 → yyyy/MM/dd/xxxxxxxx_filename
      */
-    private String generateCosKey(String originalFileName) {
+    private String generateCosKey(String originalFileName, String prefix) {
         String uuid = UUID.randomUUID().toString().replaceAll("-", "").substring(0, 8);
         String dateTime = new DateTime().toString("yyyy/MM/dd");
+
+        if (StringUtils.isNotBlank(prefix)) {
+            // 清理prefix，防止出现多余斜杠
+            String cleanPrefix = prefix.trim().replaceAll("^/+|/+$", "");
+            return cleanPrefix + "/" + dateTime + "/" + uuid + "_" + originalFileName;
+        }
+
         return dateTime + "/" + uuid + "_" + originalFileName;
     }