diff --git a/src/main/java/com/sunyard/inf/SydCryptionApi.java b/src/main/java/com/sunyard/inf/SydCryptionApi.java
index 7a35f4d..4a5f9c9 100644
--- a/src/main/java/com/sunyard/inf/SydCryptionApi.java
+++ b/src/main/java/com/sunyard/inf/SydCryptionApi.java
@@ -38,6 +38,14 @@ interface SydHashApi {
      */
     byte[] SM3Hash(String publicKey, byte[] msg, int block, byte[] mac);
 
+    /**
+     * 计算SM3散列值
+     * @param publicKey 公钥的 DER 编码 (03420004 开头)
+     * @param userId 用户ID
+     * @param msg 原始数据，二进制的消息块
+     * @return
+     */
+    byte[] SM3Hash(String publicKey, String userId, byte[] msg);
 
     /**
      * 输入对指定的原始数据和公钥，通过 SM3 算法计算数据的散列值。
diff --git a/src/main/java/racal/sunyard/main/SydApi4j.java b/src/main/java/racal/sunyard/main/SydApi4j.java
index 5df8a00..37e6c29 100644
--- a/src/main/java/racal/sunyard/main/SydApi4j.java
+++ b/src/main/java/racal/sunyard/main/SydApi4j.java
@@ -4669,6 +4669,11 @@ public class SydApi4j implements SydApi {
 
 
 
+    @Override
+    public byte[] SM3Hash(String publicKey, String userId, byte[] msg){
+        return SM3Hash(publicKey, null, null, userId, msg);
+    }
+
     @Override
     public byte[] SM3Hash(String publicKey, byte[] msg, int block, byte[] mac) {
 
diff --git a/src/test/java/com/sunyard/sydapi/test/TestSM3PK.java b/src/test/java/com/sunyard/sydapi/test/TestSM3PK.java
new file mode 100644
index 0000000..f808b93
--- /dev/null
+++ b/src/test/java/com/sunyard/sydapi/test/TestSM3PK.java
@@ -0,0 +1,31 @@
+package com.sunyard.sydapi.test;
+
+
+import com.sunyard.proto.Util;
+import racal.sunyard.main.SydApi4j;
+
+
+import java.io.UnsupportedEncodingException;
+
+public class TestSM3PK {
+    public static void main(String[] args) throws UnsupportedEncodingException {
+        System.setProperty("com.sunyard.sydapi4j.debug", "true");
+
+        SydApi4j.SYD_Set_Parameter_HA("unkown", "192.168.0.200", 8889, 1000);
+
+        SydApi4j api = (SydApi4j) new SydApi4j();//.connect("wuyong.fullstack.club" , 8889, null,1000);
+        String certId = "4008258105";
+        try {
+            // "03420004" +
+            String pk =  "034200043c59ccb2c52e034337fad49eca0095587eb40e24ffc642d07e0c911ea4a3b0e94f11b92b51047f6f75badf5ab2fc2e15ba4dfddf95869d4fa8d8852dea811d4b";
+
+            byte[] ret = api.SM3Hash(pk, certId, Util.hexString2Bytes("636572745F69643D3430303832353831303526636F64653D3430303034266D73673DE7BCBAE5B091E5BF85E98089E58F82E695B0267369676E5F747970653D534D32267375625F636F64653D75702E6D697373696E672D6F72672D706964267375625F6D73673DE7BCBAE5B0916F72675F706964205B5550303231303031325D"));
+
+            System.out.println( Util.bytes2HexString( ret ) );
+        } finally {
+            api.disconnect();
+        }
+    }
+
+
+}