Lung atypical hyperplasia is a precancerous lesion that does not necessarily progress to lung cancer. Atypical hyperplasia has the potential to become cancerous and should be treated early and in a standardized manner. Lung atypical hyperplasia is categorized into high atypical hyperplasia, moderate atypical hyperplasia and low atypical hyperplasia. Low and moderate atypical hyperplasia are usually reversible. For high grade atypical hyperplasia, it has a tendency to become cancerous and needs to be treated with surgical resection as soon as possible. Atypical hyperplasia has the possibility of bi-directional development, it is not cancerous yet, but has the possibility of becoming cancerous, but it does not necessarily develop into lung cancer, it can be observed and followed up, and if necessary, it can be cured through surgical resection and other treatments. When atypical lung hyperplasia is detected, one should go to the hospital in time for diagnosis and treatment under the guidance of specialists, so as to avoid delaying the condition.