Abstract: In order to achieve a reasonable increase of the capacity of the main shaft of a coal mine, a case study was conducted to upgrade the existing conditions of the main shaft of a coal mine. The paper discussed how to change the way of unloading by changing the way of unloading and using the skip in the form of skip instead of the skip in the form of external power plate gate to shorten the promotion rest time and shortened the cycle time, increased the feasibility of enhancing the system's production capacity.