Whether or not a patient can live 20 years with a total gastrectomy is related to the severity of the disease, the underlying health condition and the care given to the patient. If a patient has undergone total gastrectomy but has no lymph node metastasis, most of them do not affect life expectancy and can survive for a long time. However, if the gastric cancer patients in middle and late stages have lymph node metastasis, the possibility of recurrence in later stages may affect the life expectancy. If the patient is given appropriate chemotherapy, radiotherapy and other follow-up treatments after surgery, and has good basic health condition, no underlying diseases, normal immunity, etc., he/she may survive for more than 20 years. In addition, patients should pay attention to a light diet, avoid spicy and stimulating foods, and eat more foods rich in vitamins and nutrients. They can eat more foods rich in vitamins and nutrients. They can also do proper exercise to strengthen their immunity. Five years after total gastric cancer resection, if the patient survives, it is considered to have been cured.