Turn plate transfer car is a kind of equipment to realize in-situ turning and reversing of track flat car. It is installed at the intersection of two tracks. One or more tracks are laid on the platform. The surface of turn plate transfer car is even with the surface of track on the ground. The gauge of turn plate transfer car is the same as that of ground. The turn plate transfer car runs completely on the turntable and stops. The turntable starts to rotate to the required angle to complete the docking with the track on the ground. The turn plate transfer car starts again and runs along the docked track to the desired position. Its special function is the common equipment in the track transportation system. The weight of the trolley is the load of the supporting turntable. The rotation angle of the turntable can be set according to the different needs of customers. It can stop at any angle of 360 degrees, and it can also realize cross operation of the well type.