The invention discloses a tandem experiment facility with five degrees of freedom for simulating ankle gaits. The tandem experiment facility comprises a general framework, a tibial shaft, a cadaver ankle tibia insertion rod, a frontward and backward movement mechanism and control system, a sagittal-plane-within rotation mechanism and control system, a coronal-plane-within rotation mechanism and control system, a level-within rotation mechanism and control system, a vertical movement mechanism and control system, a tibia loading mechanism and control system, and a muscle loading mechanism and control system. The tandem experiment facility can simulate kinematics actions in the stance phase of the ankle giants within 3 seconds to 5 seconds, can simulate dynamics in the stance phase of the ankle giants, and can collect ankle kinematics and dynamics data to obtain complete, comprehensive and effective data of original experiments on kinematics and dynamics in the stance phase of the ankle gaits, thereby providing a dynamics experiment and theoretical research platform for discussions of clinical ankle motion system disease mechanism, scientific verification of operative plans, researches of ankle motion injury and protection, development of bionic ankle systems, and the like.