The ileocecal ileocecal valve has a semilunar shape. The ileocecal valve is located between the ileum and the cecum, is an important anatomical structure, the ileocecal valve is thickened by the circular smooth muscle of the intestinal wall, and its surface is covered by the intestinal mucosa, the ileocecal valve includes upper and lower pieces, the half-moon shape of the folds, like lips between the terminal ileum and the cecum, is located in the tail of the small intestine, the beginning of the large intestine. The ileocecal valve has an important role, mainly plays the role of one-way valve, can limit the contents of the small intestine through the cecum too quickly, so as to enable the food in the small intestine to be fully absorbed, in addition, can also prevent the fecal sludge of the large intestine refluxed to the small intestine, can prevent the overgrowth of bacteria in the small intestine, can prevent the small intestine from the internal environment and the mucous membrane is damaged.