Gastrointestinal cancer is a relatively common malignant tumor. For some early-stage patients, it is possible to be cured after anti-tumor treatment, and even if it cannot be completely cured, it can still control the condition and obtain long-term survival. Gastrointestinal cancer refers to gastric cancer, intestinal cancer, liver cancer, pancreatic cancer and other digestive tract tumors. Early detection in the period of carcinoma in situ, early invasive cancer, etc., simple surgical resection can cure most of the patients. Even if the cancer spreads to the surrounding lymph nodes, as long as no distant metastasis occurs, surgical resection of the tumor and clearing of the surrounding lymph nodes followed by radiotherapy or chemotherapy can also cure some patients. It is very difficult to cure cancer completely if distant metastasis has occurred and the cancer has entered an advanced stage, but the use of chemotherapy, targeted therapy, immunotherapy and other treatment strategies can also control the disease well, alleviate the symptoms and prolong the survival time of patients.