diff --git a/server/web3bcspider/services/pull_bcevent.js b/server/web3bcspider/services/pull_bcevent.js
index 4cf6511..8267718 100644
--- a/server/web3bcspider/services/pull_bcevent.js
+++ b/server/web3bcspider/services/pull_bcevent.js
@@ -6,31 +6,10 @@ const constant = require('common/constant');
 const dbpool = require('common/dbpool');
 const BaseService = require('./baseservice');
 
-let g_bcevent_conn = null;
-let lock_times = 0;
-async function getGBcEventConn() {
-  while (lock_times > 0) {
-    await utils.sleep(1);
-  }
-  if (!g_bcevent_conn) {
-    ++lock_times;
-    try {
-      const {err, conn} = await app.getDbConn(constant.BCEVENTDB_NAME);
-      if (err) {
-        throw new Error('getGBcEventConn error:' + err);
-      }
-      g_bcevent_conn = conn;
-    } finally {
-      --lock_times;
-    }
-  }
-  return g_bcevent_conn;
-}
-
 class PullBcEvent extends BaseService {
 
   async init(bc, net, event) {
-    this.conn = await getGBcEventConn();
+    this.conn = await dbpool.getBcEventConn(app);
     this.lastBlockNumber = 0;
     this.bc = bc;
     this.net = net;