Carbon fiber resin composite materials are widely used in manufacturing and industrial production due to their many performances better than that of traditional materials. However, how to use the limited carbon fiber resin composite material to design the product with the excellent bearing capacity and relatively low processing cost still needs to be explored. The layer thickness is an important parameter during the design of carbon fiber composite. Large layer thickness between carbon fiber layer and resin layer could lead to poor mechanical properties. Small layer thickness could improve the bearing capacity but accompany with the high cost of production. Optimal layer thickness can balance the mechanical properties and production costs. Here, Abaqus software was employed to establish the finite element models with the same size but different number of layers, by dividing the mesh and finding the ultimate bearing capacity of each model, the relationship between the model layer and the ultimate loading force was obtained. Based on the calculated results, the optimal design scheme of carbon fiber resin composite materials was proposed.