Novel mine-used downward sliding type coal unloading system

The utility model discloses a novel mine-used downward sliding type coal unloading system which comprises a coal unloading system and an auxiliary device. The auxiliary device is used for providing an operating rail and an unloading rail for the coal unloading device, the coal unloading device is formed by multiple mine cars connected in sequence, each mine car comprises a mine car body and wheel bodies driving the mine car body to run, each mine car body is formed by a car base plate, a front side plate, a rear side plate, a left side plate and a right side plate, unloading wheel axles are arranged on the outer surfaces of the left side plate and the right side plate, the unloading wheel axle is provided with auxiliary unloading rail wheels, and the auxiliary unloading rail wheels are cylinder-shaped and extend to the outside of the mine car body; a mine car structure and the auxiliary device cooperate with each other, when the mine car passes through an arch-shaped rail arranged in a coal slipping well, the auxiliary unloading device slides along the arch-shaped rail, the mine car body is lifted overhead, a movable plate slides downward, an unloading window is formed by the movable plate and the car base plate so that coal can be unloaded.