This　paper　investigates　a　two-species　amensalism　model　that　includes　the　fear　effect　on　the　first　species　and　the　Beddington-DeAngelis　functional　response.　The　existence　and　stability　of　possible　equilibria　are　investigated.　Under　different　parameters,　there　exist　two　stable　equilibria　which　means　that　this　model　is　not　always　globally　asymptotically　stable.　Together　with　the　existence　of　all　possible　equilibria　and　their　stability,　saddle　connection　and　close　orbits,　we　derive　some　conditions　for　transcritical　bifurcation　and　saddle-node　bifurcation.　Furthermore,　global　dynamics　analysis　of　the　model　is　performed.　It　is　observed　that　under　certain　parameter　conditions,　when　the　intensity　of　the　fear　effect　is　below　a　certain　threshold　value,　as　the　fear　effect　increases　it　will　only　reduce　the　density　of　the　first　species　population　and　will　have　no　influence　the　extinction　or　existence　of　the　first　species　population.　However,　when　the　fear　effect　exceeds　this　threshold,　the　increase　of　the　fear　effect　will　accelerate　the　extinction　of　the　first　species　population.　Finally,　numerical　simulations　are　performed　to　validate　theoretical　results.