The survival time after left total lung resection is generally related to the cause of the disease, clinically usually divided into benign tumors and malignant tumors, the specific time should be based on the patient’s own situation, so it can not be generalized. 1. Benign tumors: if the patient is suffering from benign tumors and the whole left lung is resected, in most cases, if the condition recovers well and there are no other complications, it usually has no effect on the life expectancy. 2. Malignant tumors: if the patient is suffering from malignant tumors by resecting the whole left lung, the whole left lung resection usually has no obvious effect on the life expectancy due to malignant tumors, and the survival time is related to the stage of malignant tumors, for non-small-cell lung cancer, the 5-year survival rate: 70% for stage I, the median survival period of stage IA is close to 10 years, 40% for stage II, and 15% for stage III. Postoperative malignant tumors need to be selected according to the stage and nature of radiotherapy treatment, immunotherapy, targeted therapy and other treatments, and actively cooperate with the treatment, which can prolong the life and improve the quality of life. It is recommended that patients should go to the hospital regularly for rehabilitation checkups and active treatment, and should also consult the doctor in time if they feel unwell.