Abstract: With the continuous improvement of endoscopic equipment, the diagnosis of chronic gastritis and the detection rate of early gastric cancer have been effectively improved. At present, the main point for the endoscopic diagnosis is  to determine whether there is Helicobacter pylori (H.pylori) infection and evaluate the risk of gastric cancer through endoscopic manifestations. Since most patients with chronic gastritis have no obvious clinical symptoms, it is particularly important to understand the endoscopic performance of chronic gastritis fully and accurately. Here, we reviewed endoscopic performance  according to the presence or absence of H.pylori infection, drug  induced gastritis and high  risk mucosa.It is expected to improve the ability of endoscopic diagnosis and classification of H.pylori infection status and risk of gastric cancer, so as to be beneficial to the clinical diagnosis and treatment.

Key words: gastritis, endoscopy, Helicobacter pylori