diff --git a/packages/neuron-wallet/src/database/chain/cleaner.ts b/packages/neuron-wallet/src/database/chain/cleaner.ts
index 30ee82a673..28e0d0c28a 100644
--- a/packages/neuron-wallet/src/database/chain/cleaner.ts
+++ b/packages/neuron-wallet/src/database/chain/cleaner.ts
@@ -18,4 +18,4 @@ export default class ChainCleaner {
       }
     })
   }
-}
\ No newline at end of file
+}
diff --git a/packages/neuron-wallet/src/models/dao-utils.ts b/packages/neuron-wallet/src/models/dao-utils.ts
index 04d76060c5..921b18c1ba 100644
--- a/packages/neuron-wallet/src/models/dao-utils.ts
+++ b/packages/neuron-wallet/src/models/dao-utils.ts
@@ -45,6 +45,10 @@ export default class DaoUtils {
     return DaoUtils.daoScriptInfo
   }
 
+  static cleanInfoWhenSwitchNetwork(): void {
+    DaoUtils.daoScriptInfo = undefined
+  }
+
   static setDaoScript(info: SystemScript) {
     DaoUtils.daoScriptInfo = info
     DaoUtils.previousURL = NodeService.getInstance().core.rpc.node.url
diff --git a/packages/neuron-wallet/src/models/lock-utils.ts b/packages/neuron-wallet/src/models/lock-utils.ts
index 2ef84f8e51..424bd43a54 100644
--- a/packages/neuron-wallet/src/models/lock-utils.ts
+++ b/packages/neuron-wallet/src/models/lock-utils.ts
@@ -21,9 +21,11 @@ const subscribed = (target: any, propertyName: string) => {
   let value: any
   Object.defineProperty(target, propertyName, {
     get: () => value,
-    set: (info: { codeHash: string }) => {
-      SystemScriptSubject.next({ codeHash: info.codeHash })
+    set: (info: SystemScript | undefined) => {
       value = info
+      if (info) {
+        SystemScriptSubject.next({ codeHash: info.codeHash })
+      }
     },
   })
 }
@@ -75,6 +77,10 @@ export default class LockUtils {
     return LockUtils.systemScriptInfo
   }
 
+  static cleanInfoWhenSwitchNetwork(): void {
+    LockUtils.systemScriptInfo = undefined
+  }
+
   static setSystemScript(info: SystemScript) {
     LockUtils.systemScriptInfo = info
     LockUtils.previousURL = NodeService.getInstance().core.rpc.node.url
diff --git a/packages/neuron-wallet/src/startup/sync-block-task/create.ts b/packages/neuron-wallet/src/startup/sync-block-task/create.ts
index 19b8d04fe9..3393964d72 100644
--- a/packages/neuron-wallet/src/startup/sync-block-task/create.ts
+++ b/packages/neuron-wallet/src/startup/sync-block-task/create.ts
@@ -12,6 +12,8 @@ import logger from 'utils/logger'
 import NodeService from 'services/node'
 import NetworksService from 'services/networks'
 import { distinctUntilChanged } from 'rxjs/operators'
+import LockUtils from 'models/lock-utils'
+import DaoUtils from 'models/dao-utils'
 
 export { genesisBlockHash }
 
@@ -29,6 +31,9 @@ export interface DatabaseInitParams {
 // network switch or network connect
 const networkChange = async (network: NetworkWithID) => {
   await InitDatabase.getInstance().stopAndWait()
+  // clean LockUtils info and DaoUtils info
+  LockUtils.cleanInfoWhenSwitchNetwork()
+  DaoUtils.cleanInfoWhenSwitchNetwork()
   const info = await InitDatabase.getInstance().init(network)
 
   DataUpdateSubject.next({