Automatic positioning device of mine transport vehicle direction-adjusting rotating platform

The invention relates to an automatic positioning device of a mine transport vehicle direction-adjusting rotating platform. The mine transport vehicle direction-adjusting rotating platform comprises a turntable base, a movable turntable, and the automatic positioning device; the turntable base is fixed on a bottom plate of an underground roadway; the movable turntable is rotatably connected with the turntable base and is used for bearing a mine transport vehicle when the mine transport vehicle is subjected to direction-adjusting rotation; the automatic positioning device is arranged between the turntable base and the movable turntable; when the movable turntable rotates in place relative to the turntable base, the automatic positioning device limits rotation of the movable turntable; and the automatic positioning device comprises a limiting hole which is formed in the movable turntable and is of a through hole structure, a positioning pin hole which is formed in the turntable base below the movable turntable,