diff --git a/.env.example b/.env.example
index 62bcc37..c8de1ce 100644
--- a/.env.example
+++ b/.env.example
@@ -22,7 +22,7 @@ APP_JWT_SECRET=your-secret-key-here-change-in-production
 APP_JWT_EXPIRE=7200
 
 # Aliyun OSS Configuration
-APP_OSS_REGION=oss-cn-hangzhou
+APP_OSS_REGION=cn-hangzhou
 APP_OSS_ENDPOINT=oss-cn-hangzhou.aliyuncs.com
 APP_OSS_BUCKET=trace-system
 APP_OSS_ACCESS_KEY_ID=
diff --git a/config.yaml b/config.yaml
index 876a0d3..9962247 100644
--- a/config.yaml
+++ b/config.yaml
@@ -23,7 +23,7 @@ jwt:
 
 # 阿里云 OSS 配置
 oss:
-  region: "oss-cn-hangzhou"
+  region: "cn-hangzhou"
   endpoint: "oss-cn-hangzhou.aliyuncs.com"
   bucket: "trace-system"
   access_key_id: ""
diff --git a/config/config.go b/config/config.go
index 5a37d9b..dace11e 100644
--- a/config/config.go
+++ b/config/config.go
@@ -147,7 +147,7 @@ func setDefaults() {
 	viper.SetDefault("jwt.expire", 7200)
 
 	// OSS 默认值
-	viper.SetDefault("oss.region", "oss-cn-hangzhou")
+	viper.SetDefault("oss.region", "cn-hangzhou")
 	viper.SetDefault("oss.endpoint", "oss-cn-hangzhou.aliyuncs.com")
 	viper.SetDefault("oss.bucket", "trace-system")
 	viper.SetDefault("oss.prefix", "aftersales-confirmations")
diff --git a/services/oss_service.go b/services/oss_service.go
index 57d4d1d..ecb4fda 100644
--- a/services/oss_service.go
+++ b/services/oss_service.go
@@ -146,15 +146,7 @@ func (s OSSService) newClient() *oss.Client {
 			s.cfg.AccessKeyID,
 			s.cfg.AccessKeySecret,
 		)).
-		WithRegion(normalizeOSSRegion(s.cfg.Region)).
+		WithRegion(strings.TrimSpace(s.cfg.Region)).
 		WithEndpoint(strings.TrimPrefix(strings.TrimPrefix(normalizeOSSEndpoint(s.cfg.Endpoint), "https://"), "http://"))
 	return oss.NewClient(cfg)
 }
-
-func normalizeOSSRegion(region string) string {
-	region = strings.TrimSpace(region)
-	if strings.HasPrefix(region, "oss-") {
-		return strings.TrimPrefix(region, "oss-")
-	}
-	return region
-}