diff --git a/app/common/service/UploadService.php b/app/common/service/UploadService.php
index 33b9137..4204020 100644
--- a/app/common/service/UploadService.php
+++ b/app/common/service/UploadService.php
@@ -51,8 +51,39 @@ class UploadService
 
             $sceneUrl = $scene ? ($scene . '/') : '';
             $dir = 'x_server/' . $sceneUrl . date('Ymd') . '/';
-            $uniqueName = md5($originalName . microtime(true));
-            $objectKey = $dir . $uniqueName . ($extension ? ('.' . $extension) : '');
+            // 使用传入的 original_name 命名（缺少扩展名时补上推断的扩展名），并做简单安全处理
+            $safeBaseName = preg_replace('/[\\\\\/]+/', '_', $originalName);
+            if ($extension && strtolower(pathinfo($safeBaseName, PATHINFO_EXTENSION)) !== strtolower($extension)) {
+                // 若提供的名称没有扩展名或扩展名不一致，则以推断扩展名为准
+                $safeBaseName = pathinfo($safeBaseName, PATHINFO_FILENAME) . '.' . $extension;
+            } elseif (!$extension && !pathinfo($safeBaseName, PATHINFO_EXTENSION)) {
+                // 实在没有扩展名信息时，保持原名
+            }
+
+            // 重名检测：同一目录、同名且同类型则在文件名后追加序号
+            $uploadedFilesService = new UploadedFilesService();
+            $candidateName = $safeBaseName;
+            $nameBody = pathinfo($safeBaseName, PATHINFO_FILENAME);
+            $nameExt = pathinfo($safeBaseName, PATHINFO_EXTENSION);
+            $counter = 1;
+            while (true) {
+                $candidatePath = $dir . $candidateName;
+                $existing = $uploadedFilesService->getFile(['file_path' => $candidatePath]);
+                if (!$existing) {
+                    break;
+                }
+                // 若存在同路径同名，且类型也相同，则追加序号
+                if (isset($existing->file_type) && strtolower($existing->file_type) === strtolower($mime)) {
+                    $suffix = ' (' . $counter . ')';
+                    $candidateName = $nameBody . $suffix . ($nameExt !== '' ? ('.' . $nameExt) : '');
+                    $counter++;
+                    continue;
+                }
+                // 类型不同则允许同名，结束循环
+                break;
+            }
+
+            $objectKey = $dir . $candidateName;
 
             $ossService = new OssService();
             $ossService->uploadImage($filePath, $objectKey);