Lung nodules diagnosed with suspected precancerous lesions have the potential to develop into lung cancer, which is a serious condition if not treated in a timely manner. If detected, diagnosed and treated early, the cure rate of precancerous lung nodules is high and the prognosis is good, and generally it will not develop into serious conditions. For lung nodules suspected to be precancerous, if the results of various examinations show that the lung nodules are suspected to be precancerous, it is necessary to improve the pathological tissue biopsy, such as trans-fibreoptic bronchoscopy biopsy, CT-guided percutaneous lung aspiration biopsy, ultrasound localization aspiration biopsy, surgical resection of lesion biopsy, etc. The treatment mode is mainly based on surgical resection. Failure to intervene leads to malignancy of the treated pulmonary nodule, which can affect the prognosis of the disease. If the lung nodule is determined to be benign after complete examination, the patient does not need to worry too much, and should follow the doctor’s instructions for individualized treatment and regular follow-up. If the diagnosis is not confirmed, the patient should not be overly worried, and should build up confidence in the treatment and undergo regular diagnosis and treatment as soon as possible.