diff --git a/app_ipc_monitoring/src/main/java/com/zhidao/adas/client/DataDistribution.java b/app_ipc_monitoring/src/main/java/com/zhidao/adas/client/DataDistribution.java
index 879dca8156..aefb5ed711 100644
--- a/app_ipc_monitoring/src/main/java/com/zhidao/adas/client/DataDistribution.java
+++ b/app_ipc_monitoring/src/main/java/com/zhidao/adas/client/DataDistribution.java
@@ -116,7 +116,8 @@ public class DataDistribution {
     }
 
     private String onTransmit(String time, BaseInfo data) {
-        String str = cutDown(data.toString());
+        String temp = data.toString();
+        String str = cutDown(temp);
         if (data instanceof Trajectory) {
             listTrajectory.add(0, time + str);
             if (listTrajectory.size() > LIST_SIZE) {
@@ -310,7 +311,7 @@ public class DataDistribution {
 //            }
         }
 
-        return str;
+        return temp;
     }
 
     private class WriteThread implements Runnable {