Patients with stomach cancer should eat more fresh vegetables, fruits, eggs, milk and meat, especially garlic and green tea, which can effectively improve the immunity of the patient’s body, while patients should avoid eating too greasy, spicy and stimulating, pickled, smoked and overly hot food to avoid affecting the recovery of the disease. If the patient is in poor physical condition, it is recommended to take protein preparations such as protein powder for a long time and increase the intake of fish and eggs to improve the body resistance, which can effectively assist in the treatment of gastric cancer and prevent the recurrence of gastric cancer after surgery.