For the survival time of colon cancer patients with lung metastasis, it depends on whether it is single metastasis or multiple metastasis, etc. The survival time differs in different cases, some can survive for a long time, some can only survive 1-3 years, as follows: 1. Long-term survival: Colon cancer lung metastasis can survive for a long time, especially single lung metastasis, which can be cured by radical surgical resection, of course, the prerequisite is of course, the prerequisite is that the colon cancer has also been radically surgically resected. Therefore, for this kind of single lung metastasis, radical surgical resection of the metastatic lesion can be performed, together with postoperative adjuvant chemotherapy, so as to achieve the purpose of cure, which can lead to long-term survival after surgery; 2. 1-3 years: for multiple lung metastases or lung metastases with pleural effusion, there is no way to perform radical surgical resection, and postoperative adjuvant chemotherapy or combined targeted drug therapy is mainly used to improve patients’ life. To improve patients’ quality of life and prolong their survival time as much as possible, the general survival period is about 1-3 years. Therefore, the survival period of colon cancer patients with lung metastasis should be judged by the number of lung metastasis, the degree of metastasis and the treatment method.