Abstract： This paper introduces the clinical experience of YANG Shaoshan， a renowned Chinese medicine physician， in treating functional constipation. YANG Shaoshan holds that the main causes of functional constipation nowadays are irregular diet，unhealthy lifestyle，and emotional disorders. The key to the pathogenesis is the disharmony of the five viscera，with the liver and spleen being the main factors. Patients with the liver-spleen disharmony should take the measures of soothing the liver and fortifying the spleen and moistening the intestines to promote defecation， and modified Xiaoyao Powder based on syndrome differentiation is commonly used. For those with spleen deficiency and dampness accumulation， the appropriate treatment is to fortify the spleen and dispel dampness and remove stagnation by promoting defecation， and the common medication is modified self- made Jianpi Daozhi Decoction based on syndrome differentiation. The treatment for those with qi deficiency and fluid inadequacy is to fortify the spleen and boost qi and enrich yin and moisten the intestines，often with modified Zengye Decoction and Wuren Pills based on syndrome differentiation. In short，clinical treatment prioritizes fortifying the spleen and harmonizing the stomach and uses the methods of soothing the liver， fortifying the spleen， harmonizing the stomach， and promoting qi movement， with the medication based on syndrome differentiation.