Gastroscopy needs to be rechecked about 1 month after surgery for esophageal cancer, but due to individual differences, some patients also need to be rechecked 2~3 months after surgery. Esophageal cancer is a malignant tumor originated from esophagus, and surgical treatment is an important treatment means for esophageal cancer. Most of the patients will basically recover from surgical wounds and physical condition about 1 month after surgery, and at this time, gastroscopy can be done to observe whether there are metastases of esophageal cancer in surgical site and other parts of the body. However, it should be noted that due to the different conditions of each person, the speed of physical recovery is not the same. For patients with more serious condition or weaker body, gastroscopy can be done about 2~3 months after surgery. For those who are very weak and cannot afford ordinary gastroscopy, they can choose painless gastroscopy. Since there is a possibility of recurrence of esophageal cancer, patients should consult doctor for rechecking in time after surgery, and also need to have regular checkups in the later stage to avoid recurrence of the disease. Keep a good mood in daily life, avoid too much tension, and pay attention to diet.