Composite materials have fine structure,so their development is high cost and complex. Moreover developing the traditional method that is time-consuming, laborious and costly, is difficult to obtain accurate and systematic scientific conclusions. But the application of the finite element analysis software ANSYS can be optimized for composite design, performance analysis, strength of materials bearing damage by computer simulation process, which can obtaina range of experiment information,substantial cost savings and shorten the development cycle. In this paper, the properties of SiC whisker reinforced polymer composites are researched from the whisker aspect ratio, volume ratio and the interfacial bonding status by meaning of finite element software. The results show that: (1)when the aspect ratio, the interface and the volume ratio of whisker increased the load transfer distance increased at the same time andthe whisker could bear more axial stress from the matrix. (2)as the aspect ratio increased, the shearing stress on the interface reduced; however, when the interface and the volume ratio increased,the shearing stress on the interface increased. the impact of interfacial bonding status on the whiskers to bear axial stress is much larger than one of on the resin matrix.