Mild atypical hyperplasia of gastric glands is not cancerous, but belongs to the precancerous state of gastric glands. Atypical hyperplasia is a pathological concept that refers to the abnormal proliferation of squamous epithelial cells, which can be categorized into three grades of mild, moderate and severe according to the extent of involvement, and it is mild atypical hyperplasia if it involves the lower third of the epithelium. It is generally believed that the development from normal cells to tumor cells goes through the sequential process of normal, hyperplasia, atypical hyperplasia, carcinoma in situ, and invasive carcinoma. From this, it can be seen that mild atypical hyperplasia of gastric gland belongs to the precancerous state of gastric gland and is not cancer of gastric gland. However, if the condition is allowed to develop, mild atypical hyperplasia of gastric glands may evolve into cancer, i.e. carcinoma in situ or invasive carcinoma. If patients are diagnosed with mild atypical hyperplasia of gastric glands, they should actively cooperate with doctors to take appropriate measures to control the condition in time, so as to prevent it from becoming cancerous.