diff --git a/pay-java-ali/src/main/java/in/egan/pay/ali/before/api/AliPayService.java b/pay-java-ali/src/main/java/in/egan/pay/ali/before/api/AliPayService.java
index 55f6f8c..390fa59 100644
--- a/pay-java-ali/src/main/java/in/egan/pay/ali/before/api/AliPayService.java
+++ b/pay-java-ali/src/main/java/in/egan/pay/ali/before/api/AliPayService.java
@@ -315,9 +315,9 @@ public class AliPayService extends BasePayService {
     }
 
     @Override
-    public Map<String, Object> refund(String tradeNo, String outTradeNo) {
+    public Map<String, Object> refund(String tradeNo, String outTradeNo, BigDecimal refundAmount, BigDecimal totalAmount) {
 
-        return  refund(tradeNo, outTradeNo, new Callback<Map<String, Object>>() {
+        return  refund(tradeNo, outTradeNo, refundAmount, totalAmount, new Callback<Map<String, Object>>() {
             @Override
             public Map<String, Object> perform(Map<String, Object> map) {
                 return map;
@@ -326,10 +326,18 @@ public class AliPayService extends BasePayService {
     }
 
     @Override
-    public <T> T refund(String tradeNo, String outTradeNo, Callback<T> callback) {
-        return secondaryInterface(tradeNo, outTradeNo, AliTransactionType.REFUND, callback);
-    }
+    public <T> T refund(String tradeNo, String outTradeNo, BigDecimal refundAmount, BigDecimal totalAmount, Callback<T> callback) {
+        //获取公共参数
+        Map<String, Object> parameters = getPublicParameters(AliTransactionType.REFUND);
 
+        Map<String, Object> bizContent = getBizContent(tradeNo, outTradeNo, null);
+        bizContent.put("refund_amount", refundAmount);
+        //设置请求参数的集合
+        parameters.put("biz_content", JSON.toJSONString(bizContent));
+        //设置签名
+        setSign(parameters);
+        return  callback.perform(requestTemplate.getForObject(queryReqUrl + "?" + ClientHttpRequest.getMapToParameters(parameters), JSONObject.class));
+    }
     @Override
     public Map<String, Object> refundquery(String tradeNo, String outTradeNo) {
         return  refundquery(tradeNo, outTradeNo, new Callback<Map<String, Object>>() {
@@ -421,6 +429,27 @@ public class AliPayService extends BasePayService {
 
     }
 
+
+    /**
+     *  获取biz_content。请求参数的集合 不包含下载账单
+     * @param tradeNo 支付平台订单号
+     * @param outTradeNo 商户单号
+     * @param bizContent  请求参数的集合
+     * @return
+     */
+    private  Map<String, Object> getBizContent(String tradeNo, String outTradeNo,  Map<String, Object> bizContent){
+        if (null == bizContent){
+            bizContent = new TreeMap<>();
+        }
+        if (null != outTradeNo){
+            bizContent.put("out_trade_no", outTradeNo);
+        }
+        if (null != tradeNo){
+            bizContent.put("trade_no", tradeNo);
+        }
+        return bizContent;
+    }
+
     /**
      *  获取biz_content。不包含下载账单
      * @param tradeNo 支付平台订单号
@@ -428,14 +457,8 @@ public class AliPayService extends BasePayService {
      * @return
      */
     private String getContentToJson(String tradeNo, String outTradeNo){
-        Map<String, Object> bizContent = new TreeMap<>();
-        if (null != outTradeNo){
-            bizContent.put("out_trade_no", outTradeNo);
-        }
-        if (null != tradeNo){
-            bizContent.put("trade_no", tradeNo);
-        }
-        return JSON.toJSONString(bizContent);
+
+        return JSON.toJSONString(getBizContent(tradeNo, outTradeNo, null));
     }
 
 }