diff --git a/src/main/java/com/sczx/pay/service/impl/AlipayServiceImpl.java b/src/main/java/com/sczx/pay/service/impl/AlipayServiceImpl.java
index 9d7ca11..1cfff07 100644
--- a/src/main/java/com/sczx/pay/service/impl/AlipayServiceImpl.java
+++ b/src/main/java/com/sczx/pay/service/impl/AlipayServiceImpl.java
@@ -55,6 +55,9 @@ public class AlipayServiceImpl implements AlipayService {
     @Value("${alipay.serviceid}")
     private String serviceId ;
 
+    @Value("${alipay.rent.rentCategory}")
+    private String rentCategory;
+
 
     @Autowired
     private PaymentRecordMapper paymentRecordMapper;
@@ -343,7 +346,7 @@ public class AlipayServiceImpl implements AlipayService {
             model.setProductCode("PRE_AUTH_ONLINE");
 
             // 设置业务扩展参数
-            model.setExtraParam("{\"category\": \"CHARGE_PILE_CAR\",\"serviceId\": \""+serviceId+"\"}");
+            model.setExtraParam("{\"category\": \""+rentCategory+"\",\"serviceId\": \""+serviceId+"\"}");
 
             // 设置免押受理台模式
             model.setDepositProductMode("DEPOSIT_ONLY");