After total gastrectomy, weight gain is mainly achieved by increasing nutrition and frequency of eating. Total gastrectomy is the main treatment for stomach cancer and other diseases because the stomach is an important part of human body’s digestion, so after total gastrectomy it will seriously affect human body’s digestion and absorption of nutrients, and even the phenomenon of rapid weight loss will occur in a short period of time. Weight loss after total gastrectomy can be maintained by eating less and more meals, 5~6 meals per day, each meal should not be too full, and at the same time, increase nutrition, increase the intake of protein, trace elements and other substances in each meal, and use more meat, dairy and other foods. If you experience weight loss after total gastrectomy, you should consult a doctor and follow the doctor’s instructions.