Gastric severe enterosis is the fastest years away from cancer, which is related to the patient’s physical condition, genetic situation, life factors, etc. and cannot be generalized. Gastric enterosis, i.e. intestinal epithelial metaplasia, refers to the transformation of gastric mucosal epithelium into small intestine or large intestine mucosal epithelial tissue, which is a kind of precancerous lesion. If the patient has a variety of underlying diseases, such as hypertension, coronary heart disease, etc., and is in poor health, and does not take timely and effective treatment after discovery, cancer may occur in 3-6 months. In contrast, some patients have better health and actively cooperate with the treatment after detection, the time to develop cancer will be relatively longer, which may range from 1-2 years to several years. Therefore, patients are recommended to undergo timely preventive surgery, such as endoscopic mucosal dissection. Gastric severe intestinal epithelial metaplasia is closely related to gastric cancer, so patients must pay attention to it and cooperate with the treatment in time. In daily life, patients should pay attention to regular and light diet and avoid spicy and stimulating, cold and rough food.