Thread passing device capable of conducting reciprocating sewing

The thread passing device comprises a holding main body, a connecting cylinder is fixed to one side of the holding main body, a suture assembly is arranged at one end of the connecting cylinder and comprises a telescopic groove seat, a suture clamp and a suture needle, one side of the suture clamp is rotationally connected with a connecting pull rod, and the connecting pull rod is connected with the telescopic groove seat. One side of the connecting pull rod is rotationally connected with a pull seat, a suture pull rod is fixed to the other side of the pull seat, conical clamping tables are symmetrically arranged in the middle of the suture needle, one side of the suture needle abuts against a clamping block, one side of the clamping block abuts against a second spring, a pull wire is fixed to one side of the clamping block, and one side of the holding body is rotationally connected with a switching turning plate. A rotating base is arranged on one side of the switching turning plate, stay wire fixing blocks