Understanding　how　the　fear　affects　biological　populations　will　help　us　develop　more　effective　ecological　conservation　measures.　In　this　paper,　we　consider　a　stage-structured　competition　model　in　which　one　competitor　fears　the　other,　leading　to　an　impact　on　reducing　the　birth　rate　of　the　former.　First,　we　prove　the　non-negativity　and　boundedness　of　the　solutions　of　this　system　and　also　analyze　the　existence　and　stability　of　the　equilibria　of　the　system.　Our　study　shows　that　the　fear　effect　greatly　enriches　the　dynamical　behavior　of　the　originally　stage-structured　system.　The　fear　parameter　k　makes　it　possible　for　the　system　to　have　two　positive　equilibria　and　induces　transcritical　bifurcation,　pitchfork　bifurcation,　and　saddle-node　bifurcation.　Interestingly,　we　find　that　the　stage-structured　competition　system　is　more　sensitive　to　the　fear　effect.　Under　the　same　conditions,　a　smaller　value　of　k　in　system　with　stage　structure　can　lead　to　alterations　in　the　system’s　dynamic　behaviors.　Finally,　numerical　simulations　are　conducted　to　support　and　illustrate　the　theoretical　results.　©　The　Author(s),　under　exclusive　licence　to　Springer　Nature　Switzerland　AG　2025.