The temperature field by influenced during the curing process of the autoclave, the composite material laminate produces thermal stress and curing residual stress resulting in deformation. Hence, the product is difficult to achieve the expected goal. In this paper, finite element analysis of composite laminates is carried out by using ABAQUS software. For the composite prepreg unidirectional zone, the finite element simulation of the temperature distribution, stress distribution and deformation of composite laminates is carried out during the curing process. The mathematical model of composite curing is established, and the curves of stress and temperature with time are obtained. The influence of various factors on the curing effect is obtained. The influence of factors such as autoclave holding temperature, heating rate, gas pressure in the tank and layup angle on the temperature field and stress field of composite laminates are discussed by finite element method. Through the method of finite element model, time and experiment cost can be saved effectively, which provides a powerful theoretical basis for actual production.