Elderly gastrectomy relies on the small intestine for digestion, patients with gastrectomy should pay attention to their diet after postoperative ventilation, focusing on light and nutritious, and eating less spicy and stimulating food. The organism in addition to the stomach is the place of digestion and absorption, the small intestine is also the main place of digestion and absorption of human food. After gastrectomy, the elderly mainly rely on the small intestine to digest and absorb nutrients. It is recommended that patients after gastrectomy should eat after the phenomenon of postoperative ventilation, after the ventilation of the gastrointestinal function began to recover, patients can eat light and easy to digest food, such as rice porridge, noodle soup, etc., and eat less spicy, stimulating food, such as chili peppers, peppercorns and so on. If the patient’s body has recovered, in the daily diet can be appropriate to eat nutritious food, such as chicken, lean meat and so on. Patients should not eat more, try to ensure that small meals, avoid indigestion and other gastrointestinal discomfort symptoms. Elderly people mainly rely on the small intestine for digestion after gastrectomy. Patients are advised to adjust their diet after gastrectomy and follow the doctor’s instructions for review.