As a type of malignant tumor, gastric cancer is extremely malignant and patients with advanced gastric cancer rapidly develop infiltration of surrounding organs and metastasis of lymph nodes. Once diagnosed with advanced stage, many of them are unable to perform surgical treatment. If chemotherapy and radiotherapy regimens are actively applied for conservative treatment with obvious effect, they can survive for about 12 months, but if maintained by nutritional support only generally in 3-6 months patients will suffer from multi-organ failure and even the possibility of death. According to the stage of gastric cancer, there are generally adenocarcinoma, medium differentiated adenocarcinoma, mucinous cell carcinoma, etc. The lower the degree of differentiation, the higher the degree of malignancy, the greater the possibility of metastasis and the faster the tumor metastasizes.