Cutting off a piece of the lobe of the lung causes very certain damage to the body in clinical practice. As an invasive procedure, the patient’s qi and blood will be deficient and the immune system will be reduced, which in turn will lead to the possibility of infection. The lung is the main space for blood oxygen exchange, and cutting off a lobe reduces the space, making it difficult for the patient to breathe and unable to tolerate heavy lifting. Clinically, the lungs should be protected, including reducing inflammation and improving immunity through proper exercise, a proper diet, and a regular routine. Staying away from polluted air, not smoking, not drinking alcohol, etc. are helpful to improve the remaining lung function. It is recommended to drink more than 1 liter of water a day to ensure the humidification of the airways, which will also keep the lung function healthy.