Abstract: In this article, the advantages and disadvantages of various kinds of main shaft bottom hole coal cleaning system and clean ways were analyzed, and the optimization design for chute leak coal cleaning system was put forward. In this system, the lower mouth funnel was changed to chute, and the leak coal slipped to the tunnel at the bottom side itself through the chute, and then the coal was transported directly to the auxiliary shaft cage by trackless rubber wheel car, raised to the ground. The system had some advantages, such as the simple construction process, small labor intensity, safety and efficiency and the good work environment etc.