Abstract: The influence that slope floor on coal storage capacity of circular coal yard were studied by numerical calculation method,the relationship between coal storage and floor slope are obtained.The results show that the storage capacity can significantly increase by appropriately adjusting the floor slope and the best solution of coal storage amount is exist at each specific coal yard diameter.The numerical calculation results are also used to analyze the effect of the slope floor on construction cost of coal handling system,a method to optimizing the design and saving the investment are put forward.