Stomach cancer chemotherapy 8 times does not determine the severity of the disease, but is more related to the stage, differentiation degree, pathological type and so on. Gastric cancer is a malignant tumor caused by a variety of factors, such as Helicobacter pylori infection and gene mutation. The important therapy after disease diagnosis is chemotherapy, of which the number of postoperative adjuvant chemotherapy is mostly 6-8 times. The severity of the disease is more related to the TNM staging, i.e., according to the development of the tumor, the degree of lymph node metastasis, and whether distant metastasis occurs, it is divided into four stages, of which the later the stage, the more serious the disease is, and the worse the prognosis is. It is also related to the degree of differentiation of cancer cells, which can be classified into high, medium and low, and the higher the classification, the higher the degree of malignancy and the worse the prognosis. In addition, in the pathologic classification of gastric cancer, the degree of malignancy of indolent cell carcinoma is higher and more serious than that of adenocarcinoma.