diff --git a/server/web3bcspider/services/pull_bcevent.js b/server/web3bcspider/services/pull_bcevent.js
index e515c90..b13b223 100644
--- a/server/web3bcspider/services/pull_bcevent.js
+++ b/server/web3bcspider/services/pull_bcevent.js
@@ -62,8 +62,7 @@ class PullBcEvent extends BaseService {
   }
 
   getInstanceName() {
-    const eventConf = this.event['eventConf'];
-    const instName = this.getNetId() + '.' + eventConf['contract_name'] + eventConf['event_name'] ;
+    const instName = this.getNetId() + '.' + this.getContractByName() + '.' + this.getEventName();
     return instName;
   }
 
@@ -209,6 +208,10 @@ class PullBcEvent extends BaseService {
     return '';
   }
 
+  getContractName() {
+    return this.eventConf['contract_name'];
+  }
+
 }
 
 module.exports = PullBcEvent;