diff --git a/src/components/providers/forms/ProviderForm.tsx b/src/components/providers/forms/ProviderForm.tsx
index 483e12ca8..a33c5c065 100644
--- a/src/components/providers/forms/ProviderForm.tsx
+++ b/src/components/providers/forms/ProviderForm.tsx
@@ -543,7 +543,7 @@ export function ProviderForm({
     if (appId === "claude" && category === "cloud_provider") {
       // 验证 Region 格式
       const regionValue = templateValues.AWS_REGION?.editorValue?.trim() || "";
-      const regionPattern = /^[a-z]{2}-[a-z]+-\d+$/;
+      const regionPattern = /^[a-z]{2}(-[a-z]+)+-\d+$/;
       if (!regionPattern.test(regionValue)) {
         toast.error(
           t("providerForm.invalidRegion", {
diff --git a/src/config/claudeProviderPresets.ts b/src/config/claudeProviderPresets.ts
index 8d82386fc..0bc16286d 100644
--- a/src/config/claudeProviderPresets.ts
+++ b/src/config/claudeProviderPresets.ts
@@ -565,6 +565,7 @@ export const providerPresets: ProviderPreset[] = [
         placeholder: "your-bedrock-api-key",
         editorValue: "",
         optional: true,
+        isSecret: true,
       },
       AWS_ACCESS_KEY_ID: {
         label: "Access Key ID",