Short circuit device applied to circuit breaker

The invention provides a short circuit device applied to a circuit breaker. The device comprises a mounting frame; the mounting frame is fixedly connected to the circuit breaker; two link rods which are symmetrically arranged are arranged on the mounting frame; one end of each link rod is rotationally connected to the mounting frame and a sliding groove is formed in the other opposite end; a short-circuit copper bar is also arranged on the mounting frame; the short-circuit copper bar is in contact with an outgoing line copper bar on the circuit breaker; the short-circuit copper bar is providedwith two symmetrical connecting rods; the connecting rods are rotationally connected to the mounting frame through rotating shafts; the connecting rods are further provided with rotating shafts located in the sliding grooves; a lever is arranged between the two link rods; the lever is rotatably mounted on the rotating shafts in a sleeving manner, and the lever is further connected with at least one link rod through at le