Gastric cancer surgery involves the removal of the entire gastric tumor and the surrounding gastric wall. After surgery, there is an abnormality in the continuity of the stomach, and the small intestine needs to be reconnected to the stomach, after which fluid from the digestive tract may reenter the stomach, causing a chronic, nonspecific inflammatory change in the residual stomach. Belching is the most common symptom of chronic gastritis. To reduce belching, it is important to eat a diet high in protein, easily digestible, and high in vitamins, and to avoid legumes that produce a lot of gas and are not easily digested. Too much of this type of food can easily lead to flatulence and belching, which can affect the patient’s recovery after surgery.