In order to realize the goal of high efficiency, energy saving, environmental protection, all kinds of new type of mine auxiliary transportation equipment arises. New mine fully mechanized face equipment auxiliary transport device ZY series hydraulic shifter unit was taken as example, combined with the actual use, the principle, working mode and advantages and disadvantages of hydraulic shifter unit were introduced, the result shows that the equipment could improve mechanization without underground secondary pollution, which provided experience and reference for the future technology.