Novel mine-used coal unloading system

The utility model discloses a novel mine-used coal unloading system which comprises a coal unloading device 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, the top portions of the left side plate and the right side plate are provided with a side beam respectively, an unloading wheel axle is arranged on the outer side face of each side beam, the unloading wheel axle is provided with auxiliary unloading rail wheels, and the auxiliary unloading rail wheels are column-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, the car base plate slides downward, a side unloading plate is driven to open through a connecting rod and a guiding rod to open to form an unloading window so that coal can be unloaded.