Special lifting appliance for subway track laying rail car

The utility model relates to a special lifting appliance for a metro track-laying rail car, which comprises a transfer main body for transferring and lifting the rail car, a limiting mechanism comprising a positioning assembly and a pressing assembly, a guide piece, a lifting mechanism and a lifting mechanism, the positioning assembly is rotatably connected with the transfer main body, the pressing assembly is arranged on the positioning assembly and is positioned below the transfer main body, and the guide piece is connected with the limiting mechanism. And the guiding part is arranged on the other side, corresponding to the pressing assembly, outside the positioning assembly, and through cooperation of the guiding part and the transferring body, when the transferring body and the rail car are connected through a steel rope and straightened, the guiding part can push the positioning assembly to move towards the lower portion of the transferring body under the effect that the steel rope is straightened, and t