IntroductionChlorine-based disinfectants or chlorine gas are commonly used as disinfectants in public drinking water and swimming pools. As strong oxidizing agents, large inhalations of chlorine gas in a short period can lead to systemic disease primarily characterized by acute respiratory injury, resulting in chlorine gas poisoning. Severe chlorine poisoning can lead to acute respiratory distress syndrome (ARDS), posing a life-threatening risk[1]. Extracorporeal cardiopulmonary resuscitation (ECPR) is a resuscitation technique utilizing extracorporeal membrane oxygenation (ECMO) to support cardiopulmonary function, with its use in pediatric cardiac arrest cases gradually increasing in recent years[2]. This article reports a case of a child who, following chlorine poisoning, developed ARDS and experienced three episodes of cardiac arrest. Full recovery was achieved with ECPR support, with no significant residual complications.