People usually think that tea belongs to the health care, for cancer patients can drink tea issue, should be viewed from both sides of the positive and negative. Generally speaking, it is beneficial and harmless for cancer patients to drink tea. Drinking tea can counteract the harmful effects of smoking on the human body, and it can also be diuretic, which helps to reduce edema. After research, it was also found that drinking tea can reduce the damage caused by radiotherapy and has an anti-radiation effect. In addition, certain components in tea have anti-cancer effects and can inhibit the development of cancer cells. Therefore, patients can be encouraged to drink small amounts of strong tea. However, due to the tannic acid and other substances contained in tea, it can hinder the absorption of vitamins and various nutrients in the body. At the same time, tea should not be taken at the same time as traditional Chinese medicine, but should be spaced out for some time to prevent affecting the absorption of traditional Chinese medicine. Therefore, it is recommended that tumor patients drink tea in moderation, and anything in excess can have a counter effect.