According to domestic literature, the incidence of major postoperative surgical complications of esophageal cancer and cardia cancer is 10.3%~27.1%, and the surgical complications have been studied more thoroughly clinically and have been better controlled. And we have observed clinically that postoperative diarrhea occurs more often, which seriously affects the mental status and nutritional recovery of postoperative patients and brings difficulties to the later treatment, and is one of the important factors affecting the effect of long-term postoperative recovery. Post-operative diarrhea after esophageal cancer is mainly related to the severing of the vagus nerve during surgery, which leads to gastrointestinal dysfunction and accelerated intestinal peristalsis, and affects both digestion and absorption of food. It has been found that postoperative thoracic gastric emptying of esophageal cancer is significantly delayed, gastric acid secretion is reduced, serum gastrin level is significantly increased, postoperative bile secretion is reduced, gallbladder emptying is impaired, and gastric bile emptying is not synchronized, resulting in diarrhea and impaired fat absorption. It is clinically observed that postoperative diarrhea after esophageal cancer is not related to age, gender, duration of disease, lesion site and surgical method. Once diarrhea occurs after esophageal cancer surgery, we should take active measures, mainly adopting the following conservative medical treatment methods: (1) Adjusting dietary structure: According to the study of Zhao Yongfan and others, the effect of free fatty acid in blood after esophageal cancer surgery is not significant, but it has obvious effect on fat-soluble vitamins. (2) Give gastric enzyme combination, pancreatic enzyme combination and multi-enzyme preparation to help digestion of nutrients. (3) The use of antidiarrheal drugs: such as phenylephrine, bismuth subcarbonate, etc. (4) Chinese herbal medicine treatment. Some scholars have reported that Chinese medicine has achieved significant results in the treatment of postoperative diarrhea. After regular medical management, most patients’ symptoms improved.