diff --git a/api/collection.go b/api/collection.go
index 148cb35..c0fce80 100644
--- a/api/collection.go
+++ b/api/collection.go
@@ -1,10 +1,12 @@
 package api
 
 import (
+	"fmt"
 	"sync"
 
 	"git.pyer.club/kingecg/godocdb/document"
 	"git.pyer.club/kingecg/godocdb/index" // "fmt"
+	"go.mongodb.org/mongo-driver/bson/primitive"
 )
 
 // "go.mongodb.org/mongo-driver/bson"
@@ -44,9 +46,18 @@ func NewCollection(name string, storagePath string) (*Collection, error) {
 func (coll *Collection) InsertOne(doc interface{}) error {
 	// 自动生成文档ID
 	// docID := generateID()
+	docMap, ok := doc.(map[string]interface{})
+	if !ok {
+		return fmt.Errorf("document must be a map[string]interface{}")
+	}
+	docID, exists := docMap["_id"].(primitive.ObjectID)
+	if !exists {
+		docID = primitive.NewObjectID()
+		docMap["_id"] = docID
+	}
 
 	// 将collection信息传递给文档管理层和索引管理层
-	if err := coll.documentStore.StoreDocument(coll.name, "", doc); err != nil {
+	if err := coll.documentStore.StoreDocument(coll.name, docID.String(), doc); err != nil {
 		return err
 	}