Three-year postoperative recurrence of stomach cancer with metastasis to lungs can be treated by surgery and radiotherapy. 1. When gastric cancer recurs three years after surgery and metastasizes to lungs, if the discovery is early, the lesion is small, and at the same time there is no metastasis to other parts, and the physical quality is good, the lesion can be removed by surgery, and at the same time, the treatment can be carried out with chemotherapy, and the development of the disease can be controlled effectively. 2. If the patient’s lesion is larger at this time or has already metastasized to other parts of the body, chemotherapy can be carried out through the use of carboplatin, cisplatin and other drugs, and local radiation therapy at the same time. After cancer recurrence, patients should be treated in time in order to prolong the survival period.