Underground coal quality management in Xingdong Mine adopted underground pre-discharge gangue system, raw coal did not lift out of the shaft, screening and washing gangue was selected underground to achieve purification and quality improvement. With the continuous extension of the production period of the mine, the amount of coal  decreased year by year, the mining conditions gradually became worse, less resources and poor coal quality became the key factors restricting the economic benefits of Xingdong Mine. The mine used the mature roadway gangue filling technology to fill all the gangue generated in the production process into the filling roadway, and realized that the gangue entered the coal flow without lifting out of the shaft, and was processed nearby, with economic benefits.