The turntable rail transfer car is a kind of handling system, which can make the rail car turn 90 degree on rails. Principle: transfer car runs on the turntable, which will automatically rotate or manually rotate to realize the joint with vertical rails. After turntable rotating, the transfer car can run along the vertical rails. The handling solution can be applied in the occasion such as ring rails, crossing rails, etc. The turntable system runs steadily and has the features such as high rail jointing accuracy and can meet full automatic electrical control. It can achieve a 360 degree turn and accurate meeting the ground rails. It is easy to operate. Besides, It has a long service life and beautiful appearance.