Conventional　access　control　models　are　suitable　for　centralized　and　static　environment,　but　they　seldom　meet　the　requirements　of　open　and　dynamic　environments.　The　design　of　effective　access　control　models　to　meet　the　challenge　is　a　current　research　focus.　As　an　important　factor　in　security,　trust　is　increasingly　applied　to　security　management,　especially　in　access　control.　In　this　paper,　by　considering　multi-factors　feature　of　trust,　we　proposed　an　access　control　model　based　on　multi-factors　trust.　The　model　includes　multi-factors　trust　computation,　permission　mapping　and　feedback　module.　Simulation　results　show　that　the　model　is　suitable　for　access　control　in　dynamic　environments.　©　2012　Academy　Publisher.