A　two-species　commensal　symbiosis　model　involving　Allee　effect　and　one　party　can　not　survive　independently　is　proposed　and　studied　in　this　paper.　Sufficient　conditions　which　ensure　the　local　and　global　stability　of　the　boundary　equilibrium　and　the　positive　equilibrium　are　obtained,　respectively.　Numeric　simulations　show　that　with　the　increasing　of　Alee　effect,　the　system　takes　much　longer　time　to　reach　its　stable　steady-state　solution,　though　the　Allee　effect　has　no　influence　on　the　final　density　of　the　species.　The　Allee　effect　has　instable　effect　on　the　system,　however,　such　effect　is　controllable.