This paper explores the cognitive mechanisms of prospective memory in children with hearing impairment through two studies. Study 1, based on questionnaire results, indicates that children with hearing impairment score higher on prospective memory tasks compared to typically developing children. Study 2, derived from experimental outcomes, reveals that children with hearing impairment perform worse on both event-based and time-based prospective memory tasks than their typical hearing peers, with time-based prospective memory showing a more pronounced deficit. The findings suggest that children with hearing impairment have weaker prospective memory abilities than typically developing children, and impairments in executive function may be a significant contributing factor to the failures in prospective memory among children with hearing impairment.