Abstract: According to the analytic hierarchy process,matrix method and variable weight function, the paper determines the weights and its adjustment in Shenhua coal mine intrinsic safety management system and risk assessment application of grade. Through considering the influence of time and space change on weights, fuzzy control logic method is used to determine weights. So determined weights will reflect the impact of various factors on the overall evaluation scientifically and rationally, more accurately reflects the characteristics of the objective facts themselves.