One　degree-of-freedom　(DOF)　jumping　leg　has　the　advantages　of　simple　control　and　high　stiffness,　and　it　has　been　widely　used　in　bioinspired　jumping　robots.　Compared　with　four-bar　jumping　leg,　six-bar　jumping　leg　mechanism　can　make　the　robot　achieve　more　abundant　motion　rules.　However,　the　differences　among　different　configurations　have　not　been　analyzed,　and　the　choice　of　configurations　lacks　basis.　In　this　study,　five　Watt-type　six-bar　jumping　leg　mechanisms　were　selected　as　research　objects　according　to　the　different　selection　of　equivalent　tibia,　femur　and　trunk　link,　and　a　method　for　determining　the　dimension　of　the　jumping　leg　was　proposed　based　on　the　movement　law　of　jumping　leg　of　locust　in　take-off　phase.　On　this　basis,　kinematics　indices　(sensitivity　of　take-off　direction　angle　and　trunk　attitude　angle),　dynamics　indices　(velocity　loss,　acceleration　fluctuation,　and　mean　and　variance　of　total　inertial　moment)　and　structure　index　(distribution　of　center　of　mass)　were　established,　and　the　differences　of　different　configurations　were　compared　and　analyzed　in　detail.　Finally,　according　to　the　principal　component　analysis　method,　the　optimal　selection　method　for　different　configurations　was　proposed.　This　study　provides　a　reference　for　the　design　of　one　DOF　bioinspired　mechanism.