Abstract：According to Chinese medicine，the pathogenesis of functional constipation is mainly related to dysfunction of viscera and bowels. Although the location of the disease is large intestine，the disease is closely related to the spleen and the stomach，the kidney，the liver，the lung，and other viscera and bowels. Based on theory of ascending and descending of qi movement，It revealed the relationship between the pathogenesis of functional constipation and viscera and bowels，such as the spleen and the stomach， the heart and the kidney， the liver and the gallbladder， the lung and the intestine， with combination of relevant thesis of Chinese medicine practitioners of all dynasties. The authors thought that the spleen and the stomach are the axis of transportation；the heart and the kidney are the origin of transportation；the lung，the intestine，and the stomach play a critical part in transportation； the liver and the gallbladder are the center of transportation. Therefore， pathogenesis regularity of functional constipation was expounded ．