In order to evaluate the risk of solid propellants in the kneading process accurately,combining the triangle fuzzy number with the accident tree analysis by fuzzy set theory to form the fuzzy fault tree analysis method,this paper realizes the quantitative analysis of blast accidents of the solid propellants and verifies the validity and reliability.The results show that compared with the classical fault tree,the method of using the fuzzy fault tree can identify the source of hazard and control the risk fast...