In　this　article,　we　analyze　the　bifurcation　of　a　modified　LeslieGower　system　with　Holling　type　II　functional　response　and　fear　effect.　We　discuss　the　existence　and　stability　of　equilibria.　The　system　admits　at　most　two　positive　equilibria,　where　one　is　always　a　saddle　and　the　other　is　an　anti-saddle,　and　a　unique　degenerate　equilibrium　which　is　a　cusp　of　codimension　three.　In　addition,　with　the　change　of　parameters,　the　system　undergoes　saddle-node　bifurcation,　transcritical　bifurcation,　Hopf　bifurcation　and　cusp　type　degenerate　Bogdanov-Takens　bifurcation　of　codimension　three.　We　show　that　the　system　has　two　limit　cycles　(i.e.,　the　inner　one　is　unstable　and　the　outer　one　is　stable),　and　then　undergoes　the　bistable　phenomena.　Finally,　the　existence　of　bifurcations　are　verified　by　numerical　simulations.