Fecal bacteria transplantation is a method of treating disease by rebuilding the intestinal flora. Fecal bacteria transplantation is a method of treating diseases by using the functional flora in the feces of healthy people. It is a method of transplanting the treated fecal flora of healthy people into the intestinal tract of patients, which is able to rebuild the intestinal flora, regulate the imbalance of the intestinal flora, and rebuild the normal functioning intestinal micro-ecosystem. Fecal flora transplantation can treat nutritional metabolic diseases, improve the body’s low immunity, enhance the barrier protection function, and adjust the body’s energy balance, etc. It can be used for the treatment of recurrent Clostridium difficile infections, inflammatory bowel disease, and so on. Patients who need fecal transplantation should be under the guidance of a doctor.