Automatic surface grinding device for composite sandwich wallboard

A column is arranged on the outer side of a guide rail of a base, a plurality of sections of planing tools are arranged on the bottom face of a planing tool fixing plate of a planing tool structure, and the thicknesses of the planing tools are gradually increased in the moving direction of a wall plate. Guide wheels are arranged on the bottom face of a mold car of the moving mechanism, a fixing frame is arranged on the top face of the mold car, and a winch and a traction hook of the traction mechanism are connected through a steel rope and arranged on the bottom face of the mold car. The winchis connected with the traction hook at the tail of the die trolley through the steel rope, the die trolley can be driven by rolling of the winch to move on the guide rail in the horizontal direction,and the upper surface of the composite sandwich wallboard is ground flat when passing through the planer tool. When the composite sandwich wall plate is subjected to primary curing in a curing kiln and has demolding strength,