By　combining　advantages　of　movable　teeth　transmission　and　cam　mechanism,　a　swing　output　movable　teeth　cam　mechanism　is　proposed,　besides,　whose　structure　and　transmission　principle　are　analyzed.　As　a　new　type　of　transmission,　the　mechanism　has　the　advantages　of　flexible　teeth　number,　full　teeth　mesh,　wide　range　of　swing　angular　and　a　variety　of　swing　relationship　of　output　shaft　such　as　harmonic　curve,　parabolic　curve　and　no-dwell　modified　trapezoid　curve.　Resorting　to　cam　curve　known,　the　corresponding　relation　of　angle　of　input　and　output　cam　is　established　at　any　time,　in　order　to　solve　the　problem　that　because　of　unconstant　transmission　ratio,　drive　connection　can＇t　be　built　directly,　thus　the　equations　of　theoretical　tooth　shape　and　working　tooth　profile　of　input　and　output　cam　are　deduced　respectively.　On　the　basic　of　theoretical　analyses,　theoretical　tooth　shape　and　working　tooth　profile　engaged　line　of　input　and　output　cam　and　meshing　configuration　of　mechanism　under　the　condition　of　parameter　values　given　are　obtained,　whose　no　interference　phenomenon　verifys　the　correctness　of　equation　deduction.　Therefore,　all　of　these　results　provide　analytical　basis　for　the　further　research　and　application　in　the　future.　©　2018　Journal　of　Mechanical　Engineering.