Abstract: To carry out comprehensive and systematic evaluation for occupational hazard risk of coal mine underground system, combined with characteristics of coal mine underground system, according to laws, regulations and practice experience, main factors were selected about occupational hazard risk of coal mine underground system, the analytic hierarchy process was used to calculate the weight coefficient of each risk factor, and the consistency test was made. Through the fuzzy mathematics theory, the evaluation model was built about the occupational hazard risk of coal mine underground system, the corresponding assignment method was used to build the risk classification membership function. The risk evaluation model was established to comprehensively evaluate the occupational hazard risk of fully mechanized mining face in a coal mine. According to the evaluation result, protective measures suggestions were given to provide the basis for the occupational health management of coal mine.