diff --git a/server/web3dbspider/services/pull_dbevent.js b/server/web3dbspider/services/pull_dbevent.js
index 3aa9001..2d59dcc 100644
--- a/server/web3dbspider/services/pull_dbevent.js
+++ b/server/web3dbspider/services/pull_dbevent.js
@@ -124,9 +124,10 @@ class PullDbEvent extends BaseService {
     return this.eventConf['contract_name'];
   }
 
-  getInstanceName() {
-    const instName = this.getNetId() + ' ' + this.getContractName() + '.' + this.getEventName();
-    return instName;
+  genLogHead(msg) {
+    const logHead = this.getNetId() + ' ' + this.getContractName() + '.' + this.getEventName()
+          + ' pull_dbevent ' + msg;
+    return logHead;
   }
 
   getTableName() {