Primary and secondary bolt that assembly type structure used

The utility model relates to a bolt technical field specifically is a primary and secondary bolt that assembly type structure used, and the adjustment operation that can conveniently cooperate the bracing to carry out prefabricated component has simple structure moreover, dismantles convenient characteristics. The utility model discloses a primary and secondary bolt that assembly type structure used which characterized in that: including subtype bolt and parent form bolt, the pre -buried or chemical anchor of parent form bolt is in assembly type structure's concrete member, and parent form bolt one end is outwards seted up along the inside screw thread hole that extends of axis, and the screw rod that matches with the screw thread hole is made to one of them section of subtype bolt, and another section is provided with polygonal fastening head. Preferably, the parent form bolt outwards one end the terminal surface parallel and level or be less than concrete member's plane. Preferably, polygonal fastening link