Surgery for lymph node metastasis of stomach cancer is usually difficult to clean up. The main way for stomach cancer to develop metastasis is lymph node metastasis. Stomach cancer is a kind of malignant tumor in digestive system, with lymphatic metastasis, cancer cells can spread to the whole body, and there is the characteristic of leapfrog metastasis, therefore, it is not yet possible to diagnose whether the surgery is cleanly resected or not based on the visual inspection of surgery and postoperative test, and it is also more difficult to be cleaned up. For gastric cancer patients with lymph node metastasis, it is recommended that they should actively cooperate with doctors for treatment and undergo operations such as lymph node dissection and resection. In terms of treatment, it mainly focuses on targeted therapy to control the condition as much as possible and prolong the patient’s life. Attention, patients should take a light diet during daily maintenance, avoid spicy stimulation, and do gastroscopy regularly.