The advantages of pulmonary rehabilitation are as follows: 1. Maintain the normal cardiopulmonary activity of patients, reduce the hospitalization period and reduce the social burden; 2. Enhance the physical function of patients, for example, patients who are bedridden for a long time can help improve the weak and unstable walking condition by performing leg muscle exercises; 2. Improve the living ability of patients so that they can take care of themselves, such as dressing and eating by themselves; 3. Help patients better participate in social activities, such as going to the supermarket to buy groceries, etc., thus improving the quality of life of patients.