diff --git a/api.go b/api.go
index 73a66e1..3e8458e 100644
--- a/api.go
+++ b/api.go
@@ -115,6 +115,9 @@ func NewApiClient(config *ApiClientConfig) (*ApiClient, error) {
 		// 创建时间序列集合
 		c.mongoCreateCollection(ctx)
 
+		// 创建索引
+		c.mongoCreateIndexes(ctx)
+
 		c.mongoConfig.stats = true
 	}
 
diff --git a/api_mongo.go b/api_mongo.go
index 4d855d0..5bcfb8e 100644
--- a/api_mongo.go
+++ b/api_mongo.go
@@ -47,6 +47,21 @@ func (c *ApiClient) mongoCreateCollection(ctx context.Context) {
 	}
 }
 
+// 创建索引
+func (c *ApiClient) mongoCreateIndexes(ctx context.Context) {
+	indexes, err := c.mongoClient.Database(c.mongoConfig.databaseName).Collection(c.mongoConfig.collectionName).CreateManyIndexes(ctx, []mongo.IndexModel{
+		{
+			Keys: bson.D{{
+				Key:   "log_time",
+				Value: -1,
+			}},
+		}})
+	if err != nil {
+		c.zapLog.WithTraceId(ctx).Sugar().Errorf("创建索引：%s", err)
+	}
+	c.zapLog.WithTraceId(ctx).Sugar().Infof("创建索引：%s", indexes)
+}
+
 // 记录日志
 func (c *ApiClient) mongoRecord(ctx context.Context, mongoLog apiMongolLog) (err error) {