Lung lobectomy pleural effusion generally two weeks to one month after the disappearance of the specific time according to the patient’s physique different, different disease pleural effusion disappearance time will usually be different. Pleural effusion after lobectomy can disappear after two weeks under normal circumstances, if the patient has more pleural effusion in the chest cavity and more serious symptoms, the time for the effusion to disappear may be prolonged to one month, and if the patient’s symptoms are less severe and the absorption function is better, the absorption time may be shortened accordingly. Patients with effusion after lobectomy should be treated with anti-infective treatment in time to avoid complications. Patients should follow the doctor’s instructions for regular checkups, and at the same time pay attention to wearing masks in daily life, prohibit smoking, improve food nutrition, and eat more vitamin-rich foods to help the condition recover. Patients are advised to go to the hospital for regular checkups.