In 1944, Blalock reported the first case of successful surgical resection of lung metastases from colorectal cancer, which pioneered the surgical treatment of lung metastases from colorectal cancer, and since then, many units have also reported successful surgical treatment of lung metastases from colorectal cancer. Since then, many units have reported the successful experience of surgical treatment of lung metastases from colorectal cancer. At present, surgical resection is considered the only effective treatment for isolated lung metastases, and with the accumulation of experience in surgical treatment, more surgical experts believe that as long as the lung metastases can be completely resected, surgical treatment is recommended even if the metastases are multiple. According to the literature, the 5-year survival rate of surgical treatment can reach 22.0%-48.0%. In 1965, Thomford et al. defined the indications for resection of lung metastases: (1) the patient must be able to tolerate surgical treatment; (2) the primary cancer has been controlled; (3) there are no metastases from other sites; and (4) the lung metastases are confined to the lung on X-ray. In 2009, the NCCN proposed the following criteria for the indication of surgery for lung metastases from colorectal cancer: (1) the lesion can be completely resected and adequate lung function can be preserved based on the anatomy and invasion of the lesion; (2) the primary cancer has been radically resected; (3) resectable extrapulmonary metastases are not an absolute contraindication to lung metastasectomy; (4) the recurrence of lung metastases in some patients can still be considered for surgery.