Circuit breaker with wire end breaking prevention structure

The utility model discloses a circuit breaker with a wire end breaking prevention structure, which comprises a circuit breaker body, the top of the circuit breaker body is provided with a first groove, the middle end of the first groove is provided with a fixing block, one side of the fixing block is provided with a thread groove, the inside of the thread groove is meshed with a screw rod, one side of the screw rod is connected with a nut, and the other side of the screw rod is provided with a nut. The sides, away from the screws, of the screws are connected with circular pushing pieces, the top and the bottom of the first groove are provided with four sets of screws engaged through each set of threaded grooves, nuts connected to one sides of the screws are rotated to drive the screws to move in an engaged mode towards the interiors of the threaded grooves, and the wires are extruded through the circular pushing pieces installed on one sides of the screws. In the process that the round push piece extrudes the