diff --git a/src/main/java/com/dtk/api/client/AbstractDtkApiClient.java b/src/main/java/com/dtk/api/client/AbstractDtkApiClient.java
index 6eb6880bde022fc62bc650c9c264d41cd6804c88..9b2225b4c8e964a44f27de4cd0a61f5f631cfb5b 100644
--- a/src/main/java/com/dtk/api/client/AbstractDtkApiClient.java
+++ b/src/main/java/com/dtk/api/client/AbstractDtkApiClient.java
@@ -18,6 +18,7 @@ import java.lang.reflect.Field;
 import java.util.Collections;
 import java.util.Map;
 import java.util.Optional;
+import java.util.Random;
 import java.util.stream.Collectors;
 
 /**
@@ -92,11 +93,19 @@ public abstract class AbstractDtkApiClient implements DtkClient {
             }
         }
         Map<String, String> textParams = request.getTextParams();
+        // 创建一个Random对象
+        Random random = new Random();
+        // 生成一个6位的随机数，范围在0到999999之间
+        int randomNumber = random.nextInt(1000000);
+        String nonce = String.format("%06d", randomNumber);
+        // 获取当前时间戳
+        String Timer = String.format("%d", System.currentTimeMillis());
+
         textParams.put(DtkApiConstant.RequestCommonParam.APP_KEY, appKey);
+        textParams.put(DtkApiConstant.RequestCommonParam.Nonce, nonce);
+        textParams.put(DtkApiConstant.RequestCommonParam.Timer, Timer);
         // 生成签名
-        String urlParams =
-                textParams.entrySet().stream().filter(x -> !StringUtils.isEmpty(x.getValue())).map(entry -> entry.getKey() + "=" + entry.getValue()).collect(Collectors.joining(
-                        "&"));
+        String urlParams = String.format("appKey=%s&timer=%s&nonce=%s", appKey, Timer, nonce);
         String serverSign = SignMd5Util.sign(urlParams, appSecret);
         textParams.put(DtkApiConstant.RequestCommonParam.SIGN, serverSign);
         return textParams;
diff --git a/src/main/java/com/dtk/api/constant/DtkApiConstant.java b/src/main/java/com/dtk/api/constant/DtkApiConstant.java
index c061bb9a9a35812614d6d07d08d8423b578246db..5f287609cf9c884e099d013e172cede36bfcef9b 100644
--- a/src/main/java/com/dtk/api/constant/DtkApiConstant.java
+++ b/src/main/java/com/dtk/api/constant/DtkApiConstant.java
@@ -34,7 +34,9 @@ public class DtkApiConstant {
     }
 
     public static class RequestCommonParam {
-        public static final String SIGN = "sign";
+        public static final String SIGN = "signRan";
+        public static final String Nonce = "nonce";
+        public static final String Timer = "timer";
         public static final String APP_KEY = "appKey";
         public static final String APP_SECRET = "appSecret";
         public static final String REQUEST_URL = "requestUrl";