How long one can live in the middle and late stage of lung cancer is affected by many factors, such as the condition of underlying disease, whether there is metastasis from other organs, one’s nutritional status and treatment methods, etc., which cannot be generalized. Generally speaking, after surgery, the long survival time may reach 5 years and above, if inoperable, the survival time is 1-2 years, but if the patient is in critical condition, the survival time may be less than 3 months. If the patient has less underlying disease, the progression of the disease can be controlled after aggressive surgical resection treatment combined with postoperative chemotherapy, radiotherapy, and targeted therapy. Since these treatments may cause some damage to the body, immunity-boosting drugs such as thymus peptides can be taken to enhance the body. If the patient already has pleural metastasis, which will lead to pleural effusion, but not to distant organs, such as the brain, the impact on respiratory function is also not significant, and the patient can live a normal life. If the nutritional status is good and the mood is happy, the survival time can be up to 5 years and above. If patients cannot have surgery for various reasons, they can ensure daily nutritional intake and no serious complications occur, they may also usually be partially controlled and can survive for 1-2 years. If the patient is in poor health, has low resistance and is older, the survival time will be shorter. If distant organ metastasis occurs to the brain, causing intracranial hypertension, cerebrovascular cancer embolism and other conditions, resulting in patients with varying degrees of impaired consciousness or even coma, it can lead to serious consequences such as lung infection and respiratory failure, and death may occur at any time due to asphyxia, hypoxia, shock and arrhythmia, and survival time may be less than 3 months.