Abstract: It is difficult to insure the quality of composites for the reason that there are complicated processes during the curing process of composites.Void action and residual stress act as the main actors of influencing the quality of composite products.In this paper, the principles of void and residual stress are analyzed. The process model is established. The computer code is made to calculate the formation of the void and residual stress. The results of computation can be the base for the design of the operation process of the composite curing process.