Impact test bench and locking and releasing device thereof

The invention discloses an impact test bench and a locking and releasing device thereof, the impact test bench comprises a base, a force arm, a roller, a rotating shaft, an electromagnet and a bearingplatform; the bearing platform and the base are respectively provided with a stop block and a notch, so that the bearing platform can pass through the base along a preset track; the base is providedwith a base fixing frame for placing the electromagnet and ensuring that the electromagnet moves along the rail; the roller, the force arm and the rotating shaft form a structure to achieve connectionand buckling between the base and the bearing platform; the locking effect under the action of gravity is ensured; upward pulling force generated between the force arms by the electromagnet is utilized to break the locking state between the bearing platform and the base; the locking and releasing requirements on the tested object in the falling type impact table are met; by means of the principlethat the rolling friction c