Device and method for replacing large-scale high-speed wind tunnel model supporting mechanism

The invention discloses a replacement device and a replacement method of a large-scale high-speed wind tunnel model supporting mechanism, and aims to solve the problems that a current device for replacing a model supporting mechanism is relatively large in overall mass, relatively high in control difficulty, incapable of realizing fine position control and the like. The device comprises a middle support supporting plate, a supporting assembly used for supporting the middle support supporting plate, a baffle, a lifting adjusting device and a connecting assembly. The supporting assembly comprises universal wheels, a bottom plate, a vertical plate and an inclined rib, the universal wheels are arranged below the bottom plate and can drive the bottom plate to move, the vertical plate is arranged on the bottom plate and can be supported by the bottom plate, the two ends of the inclined rib are connected with the bottom plate and the vertical plate respectively, and the inclined rib, the bottom plate and the vertica