Stomach cancer patients who undergo surgery to remove the affected area at an early stage have a low recurrence rate of about 10 percent within five years. If the patient undergoes surgery in the middle or late stage, i.e., Stage II-III, the recurrence rate is higher and can reach 50-70%. Some studies have found that patients who have undergone radical surgical resection may still have recurrence after surgery, and 5 years after surgery is the peak period of recurrence. Therefore, after gastric cancer surgery, patients should pay attention to observation, monitoring and follow-up. Gastric cancer can be metastasized through lymphatic metastasis, hematogenous metastasis and peritoneal metastasis, and about 70% of gastric cancer can be metastasized through lymphatic metastasis. Early gastric cancer has a better prognosis after active and effective treatment. Patients with gastric cancer should try to achieve early detection and early treatment, which is the key to treatment. Stomach cancer patients should have regular review after surgery, if they have stomach discomfort, they should suspect that it is recurrence of stomach cancer after surgery and need to consult doctor actively to avoid further development of the disease.