After the patient has passed the difficult surgery, family members can’t wait to “take tonic” for the patient. So, what is good for postoperative lung cancer patients to eat? In fact, after radical lung cancer surgery, especially systemic lymph node dissection, we surgeons are very afraid of family members supplementing high-fat food for patients, which will significantly increase the patient’s chest drainage and even delay the patient’s discharge from the hospital. In conclusion, we recommend a low-fat and light diet for postoperative lung cancer patients, which is more conducive to their recovery.