LBBAP in children can achieve narrow QRS pacing andphysiological pacing with stablepacing parameters. It can improve left ventricular enlargement caused by long-term bradycardia, and cardiac dysfunction and cardiac enlargement caused by long-term right ventricular apical pacing quickly and effectively.LBBAP is safe and feasible for older children in the near future. However, the long term potential risks of LBBAP need further observation and study.