diff --git a/src/service/wp.service.ts b/src/service/wp.service.ts
index 7cba5a4..1cb3a75 100644
--- a/src/service/wp.service.ts
+++ b/src/service/wp.service.ts
@@ -11,6 +11,24 @@ export class WPService {
   @Config('wpSite')
   sites: WpSite[];
 
+  /**
+   * 构建 URL，自动规范各段的斜杠，避免出现多 / 或少 / 导致请求失败
+   * 使用示例：this.buildURL(wpApiUrl, '/wp-json', 'wc/v3/products', productId)
+   */
+  private buildURL(base: string, ...parts: Array<string | number>): string {
+    // 去掉 base 末尾多余斜杠，但不影响协议中的 //
+    const baseSanitized = String(base).replace(/\/+$/g, '');
+    // 规范各段前后斜杠
+    const segments = parts
+      .filter((p) => p !== undefined && p !== null)
+      .map((p) => String(p))
+      .map((s) => s.replace(/^\/+|\/+$/g, ''))
+      .filter(Boolean);
+    const joined = [baseSanitized, ...segments].join('/');
+    // 折叠除协议外的多余斜杠，例如 https://example.com//a///b -> https://example.com/a/b
+    return joined.replace(/([^:])\/{2,}/g, '$1/');
+  }
+
   /**
    * 获取 WordPress 数据
    * @param wpApiUrl WordPress REST API 的基础地址
@@ -31,7 +49,8 @@ export class WPService {
   ): Promise<T> {
     try {
       const { wpApiUrl, consumerKey, consumerSecret } = site;
-      const url = `${wpApiUrl}/wp-json${endpoint}`;
+      // 构建 URL，规避多/或少/问题
+      const url = this.buildURL(wpApiUrl, '/wp-json', endpoint);
       const auth = Buffer.from(`${consumerKey}:${consumerSecret}`).toString(
         'base64'
       );
@@ -64,7 +83,8 @@ export class WPService {
     while (hasMore) {
       const config: AxiosRequestConfig = {
         method: 'GET',
-        url: `${wpApiUrl}/wp-json${endpoint}`,
+        // 构建 URL，规避多/或少/问题
+        url: this.buildURL(wpApiUrl, '/wp-json', endpoint),
         headers: {
           Authorization: `Basic ${auth}`,
         },
@@ -212,7 +232,8 @@ export class WPService {
     );
     const config: AxiosRequestConfig = {
       method: 'PUT',
-      url: `${wpApiUrl}/wp-json${endpoint}`,
+      // 构建 URL，规避多/或少/问题
+      url: this.buildURL(wpApiUrl, '/wp-json', endpoint),
       headers: {
         Authorization: `Basic ${auth}`,
       },
@@ -310,7 +331,14 @@ export class WPService {
     );
     const config: AxiosRequestConfig = {
       method: 'POST',
-      url: `${wpApiUrl}/wp-json/wc-ast/v3/orders/${orderId}/shipment-trackings`,
+      // 构建 URL，规避多/或少/问题
+      url: this.buildURL(
+        wpApiUrl,
+        '/wp-json',
+        'wc-ast/v3/orders',
+        orderId,
+        'shipment-trackings'
+      ),
       headers: {
         Authorization: `Basic ${auth}`,
       },
@@ -333,7 +361,15 @@ export class WPService {
     // 删除接口： DELETE /wp-json/wc-shipment-tracking/v3/orders/<order_id>/shipment-trackings/<tracking_id>
     const config: AxiosRequestConfig = {
       method: 'DELETE',
-      url: `${wpApiUrl}/wp-json/wc-ast/v3/orders/${orderId}/shipment-trackings/${trackingId}`,
+      // 构建 URL，规避多/或少/问题
+      url: this.buildURL(
+        wpApiUrl,
+        '/wp-json',
+        'wc-ast/v3/orders',
+        orderId,
+        'shipment-trackings',
+        trackingId
+      ),
       headers: {
         Authorization: `Basic ${auth}`,
       },