Mechanism　analysis　and　synthesis　commonly　used　analytic　method　and　graphical　method,　etc.,　but　the　homotopy　method　has　high　efficiency　in　nonlinear　analysis　of　mechanism.　This　paper　applies　the　homotopy　continuation　method　PHCpack　solver　to　solve　mechanism　position　and　orientation,　and　draws　the　mechanism　configuration　according　to　the　results　obtained,　the　relative　error　of　numerical　results　to　exact　solutions　shows　that　the　homotopy　continuation　method　PHCpack　solver　can　provide　sufficient　accuracy　of　mechanism　position　and　orientation　analysis,　and　meet　the　engineering　needs.