diff --git a/core/store/ledgerstore/state_store.go b/core/store/ledgerstore/state_store.go
index 3658aae70d..3e9e0206a8 100644
--- a/core/store/ledgerstore/state_store.go
+++ b/core/store/ledgerstore/state_store.go
@@ -20,7 +20,9 @@ package ledgerstore
 
 import (
 	"bytes"
+	"errors"
 	"fmt"
+	"os"
 
 	"github.com/ontio/ontology/common"
 	"github.com/ontio/ontology/common/serialization"
@@ -30,6 +32,8 @@ import (
 	"github.com/ontio/ontology/core/store/leveldbstore"
 	"github.com/ontio/ontology/core/store/statestore"
 	"github.com/ontio/ontology/merkle"
+	"github.com/ontio/ontology/smartcontract/service/native/ontid"
+	"github.com/ontio/ontology/smartcontract/service/native/utils"
 )
 
 var (
@@ -310,3 +314,62 @@ func (self *StateStore) ClearAll() error {
 func (self *StateStore) Close() error {
 	return self.store.Close()
 }
+
+func CheckStorage(dir string) error {
+	path := dir + string(os.PathSeparator) + DBDirState
+	db, err := leveldbstore.NewLevelDBStore(path)
+	if err != nil {
+		return err
+	}
+
+	prefix := append([]byte{byte(scom.ST_STORAGE)}, utils.OntIDContractAddress[:]...)
+	flag := append(prefix, ontid.FIELD_VERSION)
+	val, err := db.Get(flag)
+	if err == nil {
+		item := &states.StorageItem{}
+		buf := bytes.NewBuffer(val)
+		err := item.Deserialize(buf)
+		if err == nil && item.Value[0] == ontid.FLAG_VERSION {
+			return nil
+		} else {
+			return err
+		}
+	}
+
+	prefix1 := []byte{0x2a, 0x64, 0x69, 0x64}
+
+	type Item struct {
+		key   []byte
+		value []byte
+	}
+	set := make([]Item, 0)
+	iter := db.NewIterator(append([]byte{byte(scom.ST_STORAGE)}, prefix1...))
+	if !iter.First() {
+		iter.Release()
+		return errors.New("storage item not found")
+	}
+	for {
+		key := append([]byte(nil), iter.Key()...)
+		val := append([]byte(nil), iter.Value()...)
+		set = append(set, Item{key, val})
+		if !iter.Next() {
+			break
+		}
+	}
+	iter.Release()
+
+	db.NewBatch()
+	for _, i := range set {
+		key := append(prefix, i.key[1:]...)
+		db.BatchPut(key, i.value)
+		db.BatchDelete(i.key)
+	}
+	tag := states.StorageItem{}
+	tag.Value = []byte{ontid.FLAG_VERSION}
+	buf := bytes.NewBuffer(nil)
+	tag.Serialize(buf)
+	db.BatchPut(flag, buf.Bytes())
+	db.BatchCommit()
+
+	return db.Close()
+}
diff --git a/main.go b/main.go
index 98716b538b..c431afd3bb 100644
--- a/main.go
+++ b/main.go
@@ -41,6 +41,7 @@ import (
 	"github.com/ontio/ontology/consensus"
 	"github.com/ontio/ontology/core/genesis"
 	"github.com/ontio/ontology/core/ledger"
+	"github.com/ontio/ontology/core/store/ledgerstore"
 	"github.com/ontio/ontology/events"
 	bactor "github.com/ontio/ontology/http/base/actor"
 	hserver "github.com/ontio/ontology/http/base/actor"
@@ -239,6 +240,7 @@ func initLedger(ctx *cli.Context) (*ledger.Ledger, error) {
 
 	var err error
 	dbDir := utils.GetStoreDirPath(config.DefConfig.Common.DataDir, config.DefConfig.P2PNode.NetworkName)
+	ledgerstore.CheckStorage(dbDir)
 	ledger.DefLedger, err = ledger.NewLedger(dbDir)
 	if err != nil {
 		return nil, fmt.Errorf("NewLedger error:%s", err)
diff --git a/smartcontract/service/native/ontid/utils.go b/smartcontract/service/native/ontid/utils.go
index 6ffa50b779..23e0bd87d2 100644
--- a/smartcontract/service/native/ontid/utils.go
+++ b/smartcontract/service/native/ontid/utils.go
@@ -18,7 +18,6 @@
 package ontid
 
 import (
-	"bytes"
 	"encoding/hex"
 	"errors"
 
@@ -26,7 +25,6 @@ import (
 	com "github.com/ontio/ontology/common"
 	"github.com/ontio/ontology/core/states"
 	"github.com/ontio/ontology/core/store/common"
-	"github.com/ontio/ontology/core/store/leveldbstore"
 	"github.com/ontio/ontology/core/types"
 	"github.com/ontio/ontology/smartcontract/service/native"
 	"github.com/ontio/ontology/smartcontract/service/native/utils"
@@ -49,6 +47,7 @@ const (
 	flag_exist = 0x01
 
 	FIELD_VERSION byte = 0
+	FLAG_VERSION  byte = 0x01
 
 	FIELD_PK byte = 1 + iota
 	FIELD_ATTR