Intramedullary nail positioning and fixing device

The utility model relates to an intramedullary nail positioning and fixing device which comprises a retainer, an intramedullary nail, a positioning device and an adjusting structure, the retainer is of an arch structure, one end of the retainer is connected with the intramedullary nail, the other end of the retainer is provided with the adjusting structure, one end of the retainer is provided with a round hole, the round hole is communicated with the intramedullary nail, and a magnetic pole is arranged in the intramedullary nail; the adjusting structure comprises an installing plate and a restraining piece, a round hole used for installing the restraining piece is formed in the installing plate, installing lugs are arranged on one side of the installing plate, an adjusting knob is arranged between the installing lugs, an adjusting nut is arranged on a screw rod at the bottom of the adjusting knob, the screw rod is rotationally connected with the restraining piece, and the restraining piece is connected with t