The high response to chemotherapy may be related to the high dosage of chemotherapy drugs or the patient’s low tolerance, and most of them are also related to the poor nutritional status of the patient. Chemotherapy is a systemic treatment that is administered intravenously and orally to kill most cancer cells. However, chemotherapy can also cause side effects such as nausea, vomiting, decrease in white blood cells and anemia. Some anti-emetic drugs can be applied before chemotherapy to alleviate the side effects, but they cannot be completely avoided. If the patient’s nutritional status is poor, hypoproteinemia or anemia, chemotherapy may not be available temporarily, and chemotherapy should be administered after the patient’s nutritional status has improved, i.e., nutritional support first. Therefore, chemotherapy needs to be individualized and the appropriate chemotherapy regimen should be chosen according to the patient’s condition.