diff --git a/internal/data/backup.go b/internal/data/backup.go
index ec5c0b06..699f7aa3 100644
--- a/internal/data/backup.go
+++ b/internal/data/backup.go
@@ -400,7 +400,6 @@ func (r *backupRepo) getStorage(backupStorage biz.BackupStorage) (storage.Storag
 		return storage.NewLocal(backupStorage.Info.Path)
 	case biz.BackupStorageTypeS3:
 		return storage.NewS3(storage.S3Config{
-			Region:          backupStorage.Info.Region,
 			Bucket:          backupStorage.Info.Bucket,
 			AccessKeyID:     backupStorage.Info.AccessKey,
 			SecretAccessKey: backupStorage.Info.SecretKey,
diff --git a/internal/service/backup_storage.go b/internal/service/backup_storage.go
index 80756fad..c5269e89 100644
--- a/internal/service/backup_storage.go
+++ b/internal/service/backup_storage.go
@@ -124,7 +124,6 @@ func (s *BackupStorageService) validateStorage(accountType string, info types.Ba
 	switch biz.BackupStorageType(accountType) {
 	case biz.BackupStorageTypeS3:
 		client, err = storage.NewS3(storage.S3Config{
-			Region:          info.Region,
 			Bucket:          info.Bucket,
 			AccessKeyID:     info.AccessKey,
 			SecretAccessKey: info.SecretKey,
diff --git a/pkg/types/backup.go b/pkg/types/backup.go
index 5b3be49e..1505b12f 100644
--- a/pkg/types/backup.go
+++ b/pkg/types/backup.go
@@ -4,13 +4,12 @@ import "time"
 
 type BackupStorageInfo struct {
 	// S3
-	AccessKey string `json:"access_key"` // 访问密钥
-	SecretKey string `json:"secret_key"` // 私钥
-	Style     string `json:"style"`      // virtual-hosted, path
-	Region    string `json:"region"`     // 地区
-	Endpoint  string `json:"endpoint"`   // 端点
-	Scheme    string `json:"scheme"`     // http, https
-	Bucket    string `json:"bucket"`     // 存储桶
+	AccessKey string `json:"access_key"`                                       // 访问密钥
+	SecretKey string `json:"secret_key"`                                       // 私钥
+	Style     string `json:"style" validate:"required|in:path,virtual-hosted"` // virtual-hosted, path
+	Endpoint  string `json:"endpoint" validate:"required"`                     // 端点
+	Scheme    string `json:"scheme" validate:"required|in:http,https"`         // http, https
+	Bucket    string `json:"bucket" validate:"required"`                       // 存储桶
 
 	// SFTP / WebDAV
 	URL        string `json:"url"`         // 网址
diff --git a/web/src/views/backup/StorageView.vue b/web/src/views/backup/StorageView.vue
index 6cb98c6a..15307e11 100644
--- a/web/src/views/backup/StorageView.vue
+++ b/web/src/views/backup/StorageView.vue
@@ -38,7 +38,6 @@ const defaultModel = {
     access_key: '',
     secret_key: '',
     style: 'virtual_hosted',
-    region: '',
     endpoint: '',
     scheme: 'https',
     bucket: '',
@@ -247,12 +246,6 @@ onMounted(() => {
         <n-form-item :label="$gettext('Style')">
           <n-select v-model:value="createModel.info.style" :options="styleOptions" />
         </n-form-item>
-        <n-form-item :label="$gettext('Region')">
-          <n-input
-            v-model:value="createModel.info.region"
-            :placeholder="$gettext('Enter region (e.g., us-east-1)')"
-          />
-        </n-form-item>
         <n-form-item :label="$gettext('Endpoint')" required>
           <n-input
             v-model:value="createModel.info.endpoint"
@@ -401,12 +394,6 @@ onMounted(() => {
         <n-form-item :label="$gettext('Style')">
           <n-select v-model:value="editModel.info.style" :options="styleOptions" />
         </n-form-item>
-        <n-form-item :label="$gettext('Region')">
-          <n-input
-            v-model:value="editModel.info.region"
-            :placeholder="$gettext('Enter region (e.g., us-east-1)')"
-          />
-        </n-form-item>
         <n-form-item :label="$gettext('Endpoint')" required>
           <n-input
             v-model:value="editModel.info.endpoint"