The liver is the main target organ of colorectal cancer hematogenous metastasis. Approximately 50%-60% of colorectal cancer patients develop liver metastases at the time of initial diagnosis or after radical surgery. The median survival of patients with unresectable liver metastases is only 6-9 months, and the 5-year survival rate is 0. The median survival of patients with radical resection of liver metastases is 30 months, and the 5-year survival rate can reach 30%-40%. Many patients and their families think that since liver metastases have occurred, the disease is already advanced and they automatically give up treatment or only perform radiotherapy, so that some patients who could have radically resected liver metastases do not receive timely and thorough treatment and lose the chance of long-term survival. Surgical indications for colorectal cancer liver metastases: ① Complete resection of primary colorectal cancer; ② Complete resection of liver metastases according to the anatomical basis of liver and the scope of lesions. The patient’s general condition such as cardiopulmonary function allows, and there is no unresectable extra-hepatic lesion. With the advancement of technology, the size, number, location and distribution of liver metastases are no longer decisive factors in determining the suitability of surgery for patients with colorectal cancer liver metastases. 2. Contraindications: ① Insufficient postoperative residual liver volume; ② Colorectal cancer primary foci cannot be resected by R0; ③ Patients’ cardiopulmonary function and other physical conditions cannot tolerate surgery; ④ Extensive extrahepatic metastases.