Chronic atrophic gastritis is primarily a chronic digestive system disease caused by atypical hyperplasia. It is mainly characterized by upper abdominal dull pain, bloating, loss of appetite, weight loss, anemia, etc., and lacks specificity. It is a disease caused by multiple pathogenic factors and is a precancerous lesion. There are many causes, including Helicobacter pylori infection and dietary factors, among others. Moreover, treatment for atrophic gastritis can be targeted based on the specific condition, clinical symptoms, and auxiliary examinations.