Nail remover for orthopaedics surgery

The invention belongs to the technical field of orthopaedics appliance, in particular to a nail remover for orthopaedics surgery. The nail remover comprises an outer sleeve pipe, wherein an inner supporting pipe is fixed to the inner part of the outer sleeve pipe; internal threads are formed in the inner supporting pipe; a rotating screw rod is in threaded connection to the inner part of the innersupporting pipe; a knife pipe head is detachably mounted at the bottom end of the rotating screw rod; a handle is arranged at the top end of the rotating screw rod; a screw clamping mechanism is arranged on the outer sleeve pipe; a rotating sleeve ring is in threaded connection to the outer sleeve pipe; trapezoid sloping blocks are arranged in a sliding groove; one end surfaces of the trapezoid sloping blocks are protruded to the outer wall of the outer sleeve pipe, and a trapezoid clamping block is connected to the other end surface of each trapezoid sloping block through a cavity connectingrod; the trapezoid clampi