diff --git a/pkg/client/orm/models.go b/pkg/client/orm/models.go
index 24f564ab..19941d2e 100644
--- a/pkg/client/orm/models.go
+++ b/pkg/client/orm/models.go
@@ -33,10 +33,7 @@ const (
 )
 
 var (
-	modelCache = &_modelCache{
-		cache:           make(map[string]*modelInfo),
-		cacheByFullName: make(map[string]*modelInfo),
-	}
+	modelCache = NewModelCacheHandler()
 )
 
 // model info collection
@@ -48,6 +45,14 @@ type _modelCache struct {
 	done            bool
 }
 
+//NewModelCacheHandler generator of _modelCache
+func NewModelCacheHandler() *_modelCache {
+	return &_modelCache{
+		cache:           make(map[string]*modelInfo),
+		cacheByFullName: make(map[string]*modelInfo),
+	}
+}
+
 // get all model info
 func (mc *_modelCache) all() map[string]*modelInfo {
 	m := make(map[string]*modelInfo, len(mc.cache))
@@ -321,7 +326,7 @@ end:
 		fmt.Println(err)
 		debug.PrintStack()
 	}
-	modelCache.done = true
+	mc.done = true
 	return
 }
 
@@ -404,14 +409,14 @@ func (mc *_modelCache) register(prefixOrSuffixStr string, prefixOrSuffix bool, m
 
 //getDbDropSQL get database scheme drop sql queries
 func (mc *_modelCache) getDbDropSQL(al *alias) (queries []string, err error) {
-	if len(modelCache.cache) == 0 {
+	if len(mc.cache) == 0 {
 		err = errors.New("no Model found, need register your model")
 		return
 	}
 
 	Q := al.DbBaser.TableQuote()
 
-	for _, mi := range modelCache.allOrdered() {
+	for _, mi := range mc.allOrdered() {
 		queries = append(queries, fmt.Sprintf(`DROP TABLE IF EXISTS %s%s%s`, Q, mi.table, Q))
 	}
 	return queries, nil
@@ -419,7 +424,7 @@ func (mc *_modelCache) getDbDropSQL(al *alias) (queries []string, err error) {
 
 //getDbCreateSQL get database scheme creation sql queries
 func (mc *_modelCache) getDbCreateSQL(al *alias) (queries []string, tableIndexes map[string][]dbIndex, err error) {
-	if len(modelCache.cache) == 0 {
+	if len(mc.cache) == 0 {
 		err = errors.New("no Model found, need register your model")
 		return
 	}
@@ -430,7 +435,7 @@ func (mc *_modelCache) getDbCreateSQL(al *alias) (queries []string, tableIndexes
 
 	tableIndexes = make(map[string][]dbIndex)
 
-	for _, mi := range modelCache.allOrdered() {
+	for _, mi := range mc.allOrdered() {
 		sql := fmt.Sprintf("-- %s\n", strings.Repeat("-", 50))
 		sql += fmt.Sprintf("--  Table Structure for `%s`\n", mi.fullName)
 		sql += fmt.Sprintf("-- %s\n", strings.Repeat("-", 50))
diff --git a/pkg/client/orm/models_boot.go b/pkg/client/orm/models_boot.go
index 407cf536..9a0ce893 100644
--- a/pkg/client/orm/models_boot.go
+++ b/pkg/client/orm/models_boot.go
@@ -14,15 +14,8 @@
 
 package orm
 
-import (
-	"fmt"
-)
-
 // RegisterModel register models
 func RegisterModel(models ...interface{}) {
-	if modelCache.done {
-		panic(fmt.Errorf("RegisterModel must be run before BootStrap"))
-	}
 	RegisterModelWithPrefix("", models...)
 }