Abstract: According to hazard theory and principle of selecting assessment index, the paper constructs assessment index system of gas explosion in heading face. Based on the method of gray clustering, principle of BP neural network and characteristics of gas explosion in heading face, safety assessment procedural diagram of BP neural network on gas explosion hazard in heading face is designed. At the same time, gas explosion hazard of concrete heading face based on safety assessment method of BP neural network is assessed and grades of comprehensive safety assessment are achieved. The statistic and dynamic safety assessment can be realized by using safety assessment method of BP neural network. It is helpful to improve the level of safety management and technology of safety assessment.