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To explore the effect of the caregiver's knowledge, behaviour and attitude on the prevention of foreign bodies in children's respiratory tracts to provide a basis for publicity and education on foreign bodies in children's respiratory tracts. A case-control method was used to investigate the knowledge, behaviour and attitude of the caregivers of 900 paediatric patients at Hunan Children's Hospital from June 2017 to February 2019. Caregivers of 300 children with foreign bodies removed by rigid bronchoscopy were selected as the case group.