Abstract: In order to identify the safety risk and risk factors in the process of coal mine equipment maintenance, we propose an improved JHA analysis method based on JHA and risk interface theory, and the risk identification is carried out by taking the belt conveyor as an example. Through the improved JHA analysis results, combined with the existing control measures of coal mine, we can find out the weakness of safety management so as to take measures to improve the safety management level of maintenance of mine enterprises.