Chronic gastritis has the potential to develop into gastric cancer. Chronic gastritis is a common disease in China. The common chronic gastritis include chronic superficial gastritis, chronic erosive gastritis and chronic atrophic gastritis, among which chronic atrophic gastritis is prone to cancer, which is clinically considered according to precancerous lesions. Theoretically, chronic gastritis has less than 10% chance of transformation to gastric cancer, and peptic ulcer has only 1% cancer rate, which means that in general, gastritis is not cancerous. In life gastritis is caused by irregular diet and poor lifestyle habits, and is a chronic inflammation of the gastric mucosa. If after long-term stimulation, the inflammation continues to fail to improve and deepen, and the gastric mucosa continues to be damaged, it will lead to atrophic gastritis and even gastric ulcer, and eventually cancer, and then deteriorate into cancer. The symptoms of early gastric cancer and chronic gastritis are particularly similar, and some patients can transform from chronic gastritis to gastric cancer. Therefore, if long-term stomach discomfort cannot be relieved, it is recommended to go to a regular hospital for gastroscopy and other related examinations, and the gold standard for gastric cancer diagnosis is gastroscopy. If it is originally gastric cancer and only shows symptoms of gastritis and delays the opportunity of treatment, it will become advanced gastric cancer, which will delay the life. Therefore, chronic gastritis should pay attention to daily maintenance, active treatment and regular medical checkups to prevent cancer in advance.