In　this　paper,　a　two-patch　model　with　additive　Allee　effect,　nonlinear　dispersal　and　commensalism　is　proposed　and　studied.　The　stability　of　equilibria　and　the　existence　of　saddle-node　bifurcation,　transcritical　bifurcation　are　discussed.　Through　qualitative　analysis　of　the　model,　we　know　that　the　persistence　and　the　extinction　of　population　are　influenced　by　the　Allee　effect,　dispersal　and　commensalism.　Combining　with　numerical　simulation,　the　study　shows　that　the　total　population　density　will　increase　when　the　Allee　effect　constant　a　increases　or　m　decreases.　In　addition　to　suppress　the　Allee　effect,　nonlinear　dispersal　and　commensalism　are　crucial　to　the　survival　of　the　species　in　the　two　patches.