The　rigid-flexible　coupling　structure　of　creatures　with　jumping　ability　has　the　advantages　of　high　stiffness　and　good　flexibility,　which　are　of　great　significance　to　its　research.　However,　existing　research　on　jumping　robots　has　not　demonstrated　the　effect　of　multiflexibility　links　on　the　jumping　performance.　In　this　paper,　a　Watt-type　one　degree-of-freedom　six-bar　mechanism　is　regarded　as　research　object.　For　a　jumping　leg　including　multiple　flexible　links　and　a　flexible　joint　with　a　floating　frame,　a　rigid-flexible　coupling　dynamic　model　is　established　with　a　pseudo-rigid-body　model　being　used.　On　this　basis,　the　effect　of　structural　and　installation　parameters　on　the　jumping　performance　is　analyzed.　Results　show　that　different　flexible　links　have　distinct　effects　on　the　jumping　performance,　and　properly　reducing　the　stiffness　of　flexible　links　can　improve　the　jumping　performance.　The　results　of　this　study　provide　a　design　basis　for　jumping　robots　with　a　rigid-flexible　coupling　structure.