When cancer metastasis occurs after gastric cancer surgery, surgical resection, radiotherapy, chemotherapy and targeted therapy can be used according to the condition. Stomach cancer is a kind of malignant tumor and has a certain recurrence rate after surgical resection. If patients are found in time and the metastasis is mild, surgery can be used for resection. If the stomach cancer is in advanced stage or the tumor tissue can no longer be completely removed by surgery, radiotherapy, chemotherapy and other treatments are needed to slow down the spread of cancer cells. However, if the physical condition is particularly poor, it may not be able to bear surgery, radiotherapy and chemotherapy, and then only nutritional support can be given. If cancer cells metastasize after gastric cancer surgery, one should go to relevant departments of hospitals as soon as possible for consultation and adopt corresponding treatment plans according to specific conditions.