At present, the incidence of intestinal tumors is increasing, and the treatment of intestinal tumors still prefers surgery, and as long as surgical resection is possible, surgical resection should be performed as much as possible. For the treatment of low rectal malignant tumor, neoadjuvant radiotherapy and chemotherapy should be preferred, and then radical surgery should be performed when the tumor is in descending stage, which can improve the 5-year survival rate of patients after surgery. In general, colon tumors do not need neoadjuvant radiotherapy and chemotherapy first, but should be treated by radical surgery directly. If the tumor has invaded the surrounding resectable organs, the resectable organs should be removed together during surgery.