Phlegm and dampness are endogenous,rise and fall with Qi,reach the limbs,diffuse the whole body,and form obesity.Regulating phlegm dampness with traditional Chinese medicine can realize the early prevention and treatment of obesity.Intestinal microbiota participates in a variety of human metabolic processes.Regulating intestinal microbiota is a new way to prevent and treat obesity.Taking the close relationship between intestinal flora and its metabolites,obesity and phlegm dampness theory as the breakthrough point,and based on the existing research results,this paper discusses the possible role of intestinal microbiota and its metabolites in the formation of phlegm dampness and the prevention and treatment of obesity,It is considered that the common intestinal microbiota and its metabolites of different individuals with obesity caused by phlegm dampness may be used as specific indicators to become the new micro identification basis of obesity phlegm dampness theory.It is proposed that intestinal microbiota and its metabolites will become the key point of obesity phlegm dampness theory research,which will provide a new explanation for obesity prevention and control research,and expand new research fields for the connotation of TCM phlegm dampness theory.