diff --git a/alipay_pay.py b/alipay_pay.py
index 1fcf4173..20dd3fc0 100644
--- a/alipay_pay.py
+++ b/alipay_pay.py
@@ -175,10 +175,13 @@ class AlipayPay:
             dict: 包含支付URL的响应
         """
         try:
+            # 金额格式化为两位小数（支付宝要求）
+            formatted_amount = f"{float(total_amount):.2f}"
+
             # 业务参数
             biz_content = {
                 'out_trade_no': out_trade_no,
-                'total_amount': str(total_amount),
+                'total_amount': formatted_amount,
                 'subject': subject,
                 'product_code': 'FAST_INSTANT_TRADE_PAY',  # 电脑网站支付固定值
                 'timeout_express': timeout_express,
@@ -209,7 +212,7 @@ class AlipayPay:
 
             # 日志输出到 stderr，避免影响 subprocess JSON 输出
             import sys
-            print(f"[AlipayPay] Order created: {out_trade_no}, amount: {total_amount}", file=sys.stderr)
+            print(f"[AlipayPay] Order created: {out_trade_no}, amount: {formatted_amount}", file=sys.stderr)
 
             return {
                 'success': True,
diff --git a/app.py b/app.py
index bd31a808..99f35f8c 100755
--- a/app.py
+++ b/app.py
@@ -2770,8 +2770,11 @@ def create_alipay_order():
             subject = f"VFr-{plan_display_name}"
             body = f"价值前沿订阅服务-{plan_display_name}"
 
+            # 金额格式化为两位小数（支付宝要求）
+            amount_str = f"{float(amount):.2f}"
+
             create_result = subprocess.run(
-                [sys.executable, script_path, 'create', order.order_no, str(float(amount)), subject, body],
+                [sys.executable, script_path, 'create', order.order_no, amount_str, subject, body],
                 capture_output=True, text=True, timeout=60
             )