With　the　development　of　Internet　and　its　application,　mobile　code　technique　has　become　a　hot　research　area　in　latest　years.　Because　mobile　codes　have　strong　ability　of　being　independent,　autonomic,　mobile,　and　mixed　with　data,　it＇s　ineffective　to　handle　their　security　issues　with　traditional　access　control　systems.　Inspired　by　the　integration　of　trusted　computing　and　object-oriented　method,　we　propose　a　new　trust　extended　object-oriented　security　model-TEOOSM,　which　can　be　applied　to　the　access　control　system　of　mobile　codes.　Our　model　encapsulates　the　code　and　data,　utilizes　the　trusted　status　measurement,　and　then　effectively　protects　platforms,　codes　and　data　from　being　destroyed　by　malicious　codes　or　systems.