Aiming at the application of composite material in certain ground maneuvering weapon system, analyze the interference connection stress of composite materials under impact loading. Based on composite material typical laminate theory hypothesis, establish the interference connection finite element models of composite material laminate, metal plate and bolt under impact loading. Then, use finite element analysis software to carry out stress analysis. The analysis results show that the stress integration situation of impact loading on model under 3 different interference value. According to the composite material laminate Tsai-Wu destroy principle and ascertain that the optimal interference value of composite material and fastener is 1.4% under impact loading.