The idea of “protecting stomach qi” runs through the Shanghan Lun.The strength of the stomach qi has an important influence on the occurrence，development，transformation and prognosis of the disease.Therefore，the fundamental role of stomach qi should be paid attention to in the treatment of various diseases.Dumping syndrome(DS) is a common complication of postoperative gastric cancer.Gastric resection causes severe damage to the stomach qi and causes digestive tract and even systemic discomfort.The idea of “protecting the stomach qi” in Shanghan Lun has important clinical significance for the treatment of dumping syndrome.