Intractable functional constipation is a type of constipation which is difficult to cure, which is usually characterized by persistent constipation, dependence on laxative and / or ineffective treatment of laxative. In recent years, with the change of diet structure, accelerated pace of life and the influence of socio-psychological factors, the incidence rate has increased year by year, seriously affecting the quality of life of patients. Professor Yao Shukun has remarkable clinical effect and experience in the treatment of intractable functional constipation. Professor Yao believes that, combined with the changes of people's diet structure, life style and physique, the main TCM syndrome type of clinical stubborn functional constipation is dampness-heat and blood stasis, and the main treatment should be clearing heat and resolving dampness, regulating qi and removing blood stasis; and we should pay attention to the application of the idea of “Simultaneous Treatment of Medicine and Food” in the process of diagnosis and treatment, and educate patients to change their diet structure in order to fundamentally dispel the etiology.