Esophageal cancer, a malignant tumor disease, has a lot of complications. If the treatment is not timely, it will bring great pain or even life threat to the patients, and the most important thing is that it will bring great difficulties to the treatment. 1. Esophageal cancer will cause functional gastric emptying disorder, and there are risks in surgical treatment of esophageal cancer. When performing surgical resection, it is necessary to remove the stomach wall, so it will affect the gastric function of the patient, and gastric motility malfunction and gastric emptying disorder are often seen after the surgery, resulting in a large amount of retained material in the stomach. 2. Esophageal cancer will cause reflux esophagitis, which is a common postoperative complication of esophageal cancer. When the patient bends his body forward after meals or sleeps in bed at night, stomach acid or food will flow back to the mouth. There is often pain behind the sternum, difficulty in swallowing and other symptoms. 3.Esophageal cancer will cause serious diarrhea. After operation, patients may have gastrointestinal function disorder, resulting in serious diarrhea, the main reason of which may be related to vagus nerve severance, gastrin concentration and so on. Patients can take antidiarrheal drugs to prevent dehydration, and can be given rehydration. 4. Anastomotic fistula, the more serious postoperative complication of esophageal cancer is anastomotic fistula, which usually occurs 4-6 days after operation, or it may be delayed, with an incidence rate of about 5%. The main causes are related to the anastomotic method, the presence or absence of anastomotic tension, the presence or absence of secondary infection in the anastomosis, and nutritional condition of the patient before operation.