The role of tea drinking in the prevention and treatment of stomach cancer should be evaluated objectively: 1) From the perspective of prevention: green tea and black tea are better 1) Tea can enhance the immunity and nutrition of the body. Tea contains many nutrients necessary for the human body, such as protein, amino acids, minerals, vitamin A, vitamin C, vitamin E and many trace elements, which can not only play a certain role in supplementing nutritional disorders, but also improve the immunity of the body. 2) Tea can help the body to eliminate harmful substances, can detoxify and inactivate toxic substances in the body, and promote excretion. (3) inhibit the synthesis of carcinogenic substances nitrosamines, especially after meals quoted green tea, the effect is better. 4) To fight the harm of alcohol, drinking tea can promote the excretion of alcohol and inhibit the carcinogenic effect of alcohol. 5) Tea can also remove the accumulated scale in the stomach and stimulate the secretion of gastric juice. Therefore, the risk of stomach cancer is reduced for people who drink tea regularly. 2. From the perspective of treatment: It is not recommended to drink tea to achieve tumor control after gastric cancer surgery. On the one hand, tea has a certain stimulating effect on the gastric mucosa, and on the other hand, it is unknown how much tea can play a role in the prevention and treatment of gastric cancer. Those who have the habit of drinking tea can use ginseng and astragalus to make water to drink, but it is still recommended to follow the treatment plan of regular hospitals.