diff --git a/ledis/ledis.go b/ledis/ledis.go
index 33bd09e..330f24c 100644
--- a/ledis/ledis.go
+++ b/ledis/ledis.go
@@ -80,24 +80,3 @@ func (l *Ledis) Select(index int) (*DB, error) {
 
 	return l.dbs[index], nil
 }
-
-func (l *Ledis) FlushDB() (drop int64, err error) {
-	db := l.ldb
-	if db == nil {
-		drop = int64(-1)
-		return
-	}
-
-	ftx := &tx{wb: db.NewWriteBatch()}
-	ftx.Lock()
-	defer ftx.Unlock()
-
-	it := db.Iterator(nil, nil, leveldb.RangeClose, 0, -1)
-	for ; it.Valid(); it.Next() {
-		ftx.Delete(it.Key())
-		drop++
-	}
-
-	err = ftx.Commit()
-	return
-}