Abstract：Professor MAO Dexi thinks that the pathological characteristics of elderly constipation are deficiency as the root and depression as the branch. He often treats elderly constipation from deficiency and depression. He summarizes Runzao Xingzhou method， Zengshui Xingzhou method， Yiqi Xingzhou method， Liqi Xingzhou method， Xuanfei Xingzhou method， Huayu Xingzhou method to treat the disease， and combines multiple methods together and bases on syndrome differentiation， with significant clinical effect.