In this paper, three kinds of carbon fiber reinforced epoxy resin (CF / EP) composites, including square, kagome and triangular grid sandwich structures, are analyzed by using ANSYS finite element analysis software. Through the comparison of the analysis results, the surface yield and core failure are the main failure mechanisms in three kinds of three-dimensional finite element models. The average bending loads of square, kagome and triangular grid sandwich structures are 18.0%, 19.7% and 24.6%, respectively. Therefore, the finite element analysis shows that more failures will occur due to the local collapse of the indenter.