Examine thymus and spleen index of the mice models, determine thymocyte multiplication by 3 HTdR incorporation, and phagocytic function of celiac macrophage by neutralred colorimetric method. Then calculate the tumor inhibitory rate. Results: Compare the group of Astragalus S4 (AS) and cyclophosphamide with the control group of cyclophosphamide, significant difference was showed. Using AS alone can also promote thymocyte multiplication of the tumorigenic mice and have some inhibitory action, the rate was 35.78%. Conclusion: AS combined with chemotherapy drugs can ameliorate the immunological s...