Full　life　cycle　automatic　generation　of　computer　animation　is　a　new　animation　technology　which　combines　artificial　intelligence　with　multimedia　technology.　In　this　system,　we　introduce　this　technology　into　3G　mobile　phone.　The　target　is　that　animation　information　of　mobile　phone　message　is　extracted　and　3D　animation　is　generated　automatically　under　computer　aided　and　sent　to　the　receiver　of　message.　Motion　planning　is　one　of　the　core　modules　in　mobile　phone　3D　animation　auto-generation　system.　In　this　thesis　,　we　build　action＇s　ontology　using　semantic　web　technology.　Firstly,　motion　planning　module　uses　topic　and　action　atoms　extracted　from　message　to　reasoning　the　corresponding　action.　Secondly,　it　processes　the　capture　data　of　action　using　motion　editing　technology　according　to　the　animation　scenes　selected　in　plot　planning.　Finally,　it　adds　action　to　the　specific　character　model　and　enriches　the　effect　of　animation.　The　paper　mainly　describes　the　overall　design,　detailed　design　of　motion　planning　and　the　specific　editing　process　of　action.