Finite element method (FEM) models have been developed. Here a loading is applied and the stress distribution is detected, and then a comparative study is carried out under different conditions. Data are provided to optimize the design of CCB hip prosthesis. FEM models of femur and CCB hip prosthesis are established; the condition of monopod support is imitated and the stress distributions are detected and compared under different conditions using three-dimension finite element analysis software Ansys5.7. The data are treated with SPSS Statistics 17.0 and presented in line chart. Result showed that (1) Connection by cancellous bone will increase stresses around the hole; (2) Holes on the lateral side can lower the maximum stress on the lateral side slightly; (3) Shortening the length of the prosthesis can enlarge the biomechanical effect of the design; (4) Stress around the lower hole is always higher than the upper one, and the direction of the force in the corresponding position basically remains the same.