After lymph node metastasis occurs in gastric cancer, clinical cure can be achieved in some patients after treatment, and the specific results are highly related to the stage and individual physique. Gastric cancer is a common malignant tumor of the digestive system, which can be caused by many factors, such as Helicobacter pylori infection and heredity. Lymph node metastasis can occur with the development of the disease, which can be seen in any stage of clinical staging. After diagnosis, the disease can be treated by surgery, radiotherapy and other methods. After active treatment, the five-year survival rate is more related to the stage. For stage I patients, it is about 90%; for stage II, about 60%; for stage III, about 30%; and for stage IV, about 10%. In general, the earlier the stage, the better the prognosis. Therefore, if lymph node metastasis occurs in gastric cancer, patients should actively consult doctor and follow doctor’s instructions for reasonable treatment in order to get a better prognosis.