diff --git a/src/facade/Db.php b/src/facade/Db.php
index e75bf535..37879246 100644
--- a/src/facade/Db.php
+++ b/src/facade/Db.php
@@ -15,6 +15,37 @@
 use think\Facade;
 
 /**
+ * @method static string getQueryClass()
+ * @method static string getBuilderClass()
+ * @method static array getFields(string $tableName)
+ * @method static array getTables(string $dbName = '')
+ * @method static int getFieldBindType(string $type)
+ * @method static array getSchemaInfo(string $tableName, bool $force = false)
+ * @method static mixed getTableInfo(array|string $tableName, string $fetch = '')
+ * @method static array getTableFieldsInfo(string $tableName)
+ * @method static string|array getPk(mixed $tableName)
+ * @method static string getAutoInc(mixed $tableName)
+ * @method static array getTableFields(mixed $tableName)
+ * @method static array|string getFieldsType($tableName, string $field = null)
+ * @method static array getFieldsBind(mixed $tableName)
+ * @method static PDO connect(array $config = [], $linkNum = 0, $autoConnection = false)
+ * @method static \think\db\BaseQuery view(array $args)
+ * @method static PDO|bool getPdo()
+ * @method static array query(string $sql, array $bind = [], bool $master = false)
+ * @method static int execute(string $sql, array $bind = [])
+ * @method static mixed transaction(callable $callback)
+ * @method static void startTrans()
+ * @method static void commit()
+ * @method static void rollback()
+ * @method static string getLastSql()
+ * @method static string getError()
+ * @method static \think\db\Builder getBuilder()
+ * @method static \think\db\BaseQuery newQuery()
+ * @method static \think\db\BaseQuery table(string $table)
+ * @method static \think\db\BaseQuery name(string $name)
+ * @method static int getNumRows()
+ * @method static string getRealSql(string $sql, array $bind = [])
+ * 
  * @see \think\DbManager
  * @mixin \think\DbManager
  */