Unwinding device rail car

The utility model discloses a rail car with an unwinding device, and relates to the technical field of rail cars. The unwinding device comprises track bodies, a vehicle body and an unwinding device main body, the vehicle body is movably installed at the upper ends of the two track bodies, the unwinding device main body is fixedly installed at the upper end of the vehicle body, four supporting plates are fixedly installed at the lower end of the vehicle body, and rolling wheels are movably installed in the four supporting plates through round rods; clamping groove parts are arranged outside theidler wheels, protruding parts are arranged at the upper ends of the two rail bodies, and the protruding parts are connected with the clamping groove parts in a clamped mode. According to the utilitymodel, a user can conveniently connect a plurality of rail bodies, and through the clamping connection of the second clamping blocks and the second grooves, gaps generated by the connection of the plurality of rail bodies can