Rigid-flexible coupling anti-subsidence bionic mechanical foot and anti-subsidence moving mechanism

The invention provides a rigid-flexible coupling anti-subsidence bionic mechanical foot and an anti-subsidence moving mechanism. The rigid-flexible coupling anti-subsidence bionic mechanical foot comprises a fixing plate, a plurality of posture-variable single bodies and a foot web imitating structure. The posture-variable single body is mounted below the fixed plate, and the flipper-imitating structure is mounted below the posture-variable single body; each posture-variable single body comprises a first guide rail, a first sliding block, a first connecting rod, a second guide rail, a second sliding block and a second connecting rod; the guide rail is mounted at the bottom of the fixing plate; a sliding block is installed at the bottom of the guide rail and can do linear reciprocating motion along the guide rail. The first connecting rod and the second connecting rod intersect with each other, the middles of the first connecting rod and the second connecting rod are connected with each other, and a spring is