Precautions after lung cancer surgery mainly include active coughing, good care of sputum expulsion, attention to diet and regular review. 1. Active coughing: after surgery, lung cancer patients have poor lung function, patients should be encouraged to take the initiative to cough, through proper coughing, it is helpful to promote lung reopening and sputum discharge, which is helpful for the recovery of condition. 2. Nursing care for sputum expulsion: family members should give sputum expulsion nursing care to patients at regular intervals, by patting the back, to promote sputum expulsion and prevent local infection caused by sputum that cannot be expelled for a long time. 3. Pay attention to diet: as lung cancer patients are weak after surgery, they should pay attention to strengthening diet and nutrition, and eat more food rich in protein in moderation, which is conducive to strengthening physical strength and recovery. 4. Regular review: the chance of recurrence after lung cancer surgery is relatively high, so patients should follow the doctor’s instruction to have regular review, so as to facilitate timely detection of early recurrence and timely standardized treatment and conditioning. After lung cancer surgery, patients should pay attention to the above precautions to promote the recovery of the disease.