Metastatic cancer can be cured, especially for oligometastases or single metastases, such as single lung metastases in breast cancer and single liver metastases in colorectal cancer, and long-term survival of more than 5 years can be achieved after radical surgical resection of single metastases, which has been proved by a lot of evidence-based medical studies abroad. Therefore, for single metastatic cancer, as long as the primary lesion is radically resected and the metastatic lesion is individually resectable, try to perform radical surgical resection on the single lesion to achieve a 5-year survival rate. Especially in breast cancer, colorectal cancer and other tumors with good prognosis, more active treatment should be given to improve the survival of patients.