Bronchoalveolar lavage (BAL) has become an important technique in the diagnosis and treatment of respiratory diseases in children. In order to standardize the clinical application of BAL in children, the Branch of Pediatric Critical Care Physicians of Chinese Medical Association, in collaboration with other institutions, has developed the "Clinical practice guidelines for bronchoalveolar lavage in Chinese children (2024)" based on the principles of the World Health Organization guidelines and the formulation/revision principles of the Chinese clinical practice guidelines (2022 edition). This guideline provides 30 recommendations to guide the operational procedures of BAL in children.儿童支气管肺泡灌洗术已成为儿童呼吸系统疾病诊治中的重要技术,为进一步规范儿童支气管肺泡灌洗术的临床应用,基于世界卫生组织指南制订手册和中国临床诊疗指南的制订/修订指导原则(2022版),中国医师协会儿童重症医师分会等机构联合制定了中国儿童支气管肺泡灌洗术临床实践指南(2024)。该指南形成30条针对儿童支气管肺泡灌洗术的推荐意见,以规范支气管肺泡灌洗术的操作流程。.