Accroding to the pressured curing process of glass fiber reinforced epoxy soybean oil acrylic resin matrix composites, considering the time-dependentproperties and viscoelasticity of the materials, a three-dimensional curing process model was established. By comparing with the experimental results, it was proved that the pressuredcuring model of composites can effectively predict the curing process of materials at different heating rates. On the basis, the effects of the changes of material parameters and the transition of Maxwell units on the stress and strain during curing were studied. The results showed that the glass fiber can effectively improve the shear strength of the material, and the low curing heating rate can effectively reduce the internal stress and curing shrinkage strain during the curing process.