Abstract： Pulmonary diseases are among the most common illnesses in newborns and children,and they remain a leading cause of mortality in children under five years of age.Therefore,accurate diagnosis and monitoring of these condi-tions are crucial.While conventional chest X-rays and CT scans have long been the primary diagnostic modalities for pul-monary diseases,they have limitations,such as inadequate identification of specific pulmonary lesions and potential radia-tion risks to children.In recent years,with increasing understanding of ultrasound technology,it has been found that ul-trasound can complement these modalities.As a non-invasive,radiation-free diagnostic tool,pulmonary ultrasound pro-vides real-time,intuitive imaging of the lungs,allowing for rapid detection and evaluation of various pulmonary lesions and facilitating timely adjustment of treatment strategies.Ultrasound,as a real-time imaging technique,has become one of the most popular clinical diagnostic methods,especially with the advent of wearable ultrasound devices that enable rap-id,dynamic,repetitive,and even continuous clinical monitoring.Ultrasound is suitable for the diagnosis and post-treat-ment evaluation of pediatric pulmonary diseases and has broad clinical applicability.