Rapid clamping wire cutting anti-wire-breaking device

A fast clamping wire cutting anti-wire-breaking device comprises a shell, a hand wheel, a main transmission rod, a transmission screw, a sliding block and a pressing rod, the main transmission rod is horizontally arranged in the middle of one side of the shell, the hand wheel is connected to one end of the main transmission rod, the end, arranged in the shell, of the main transmission rod is provided with a bevel gear A, and sliding grooves are formed in the other side of the shell in a vertically symmetrical mode; a sliding block A and a sliding block B which are matched with the groove body are arranged in the two sliding grooves respectively, a transmission screw A is arranged on the sliding block A, a bevel gear B is arranged at the end, penetrating through the sliding block A, of the transmission screw A, a transmission screw B is arranged on the sliding block B, a bevel gear C is arranged at the end, penetrating through the sliding block B, of the transmission screw B, and the bevel gear B and the bevel