diff --git a/src/main/java/com/sunyard/sge/database/SydSM4Mac.java b/src/main/java/com/sunyard/sge/database/SydSM4Mac.java
index f9a22d9..fa4333c 100644
--- a/src/main/java/com/sunyard/sge/database/SydSM4Mac.java
+++ b/src/main/java/com/sunyard/sge/database/SydSM4Mac.java
@@ -27,10 +27,10 @@ public class SydSM4Mac implements ISM4Mac {
         int length = pcData.length;
         byte[] pcdataResult = pcData;
         if (is_finished) {
-            throw new SydApiException(-1);
+            throw new SydApiException(0x8007);
         }
         if (length > 4064) {
-            throw new SydApiException(-1);
+            throw new SydApiException(0x8006);
         }
         if (0 == queue.getLength()) {
             if (length < 16) {