According　to　the　kinematics　and　the　structural　characters　of　compliant　mechanism,　degree-of-freedom　of　compliant　component　is　analysed　and　judged　in　types.　By　transforming　compliant　mechanism　into　pseudo-rigid-body　model　and　counting　the　degree-of-freedom　of　pseudo-rigid-body,　a　new　notion　for　determining　the　degree-of-freedom　of　compliant　mechanism　is　proposed.　Some　case　studies　demonstrate　that　this　method　is　feasible　and　accurate.