The brain-gut axis in the human body may be a key regulatory pathway between the brain and the gastrointestinal tract， and intestinal flora is an important player in this pathway. Eating disorder （ED） may cause intestinal flora disorder through abnormal eating behavior， and intestinal flora disorder may also affect the occurrence and development of ED through a variety of mechanisms. This paper summarizes domestic and foreign studies on the relationship between eating disorder and intestinal flora in recent years， and opens a new idea for the research and treatment of ED.