So far, there is no clinical report on the cases of lung metastasis of colon cancer patients who have been cured, but active treatment can effectively prolong the survival period. Lung metastasis of colon cancer means that the patient’s clinical stage is advanced, at this time, the opportunity of surgical treatment has been lost, and the patient is often treated with radiotherapy, targeted drugs and immunotherapy to prolong his life. It is difficult to completely remove the tumor in this period of time, and the possibility of clinical cure is very small, and the possibility of getting cured is even more minimal, and the purpose of the current treatment is mainly to improve the patient’s uncomfortable symptoms and prolong the patient’s survival period. It is recommended that patients actively cooperate with doctors and maintain a good attitude to prolong the survival period.