Liftable discharging platform

The invention discloses a liftable discharging platform composed of power devices, guide rail standard joints, guide rail supporting frames, platform box bodies, protective doors and the like. The two guide rail supporting frames are located on the left sides and the right sides of the platform box bodies correspondingly and fixed to a wall body; the two guide rail standard joints are fixed to the guide rail supporting frames correspondingly and fixed to the wall body through wall attaching frames; the power devices are installed on two bottom edge main vertical columns of the guide rail standard joints and make up-down vertical movement along the guide rail standard joints; and lug plates of the power devices and lug plates of the platform box bodies are mutually and fixedly connected together through bolts, so that it is guaranteed that the power devices drive the platform box bodies to move vertically up and down while moving up and down. Because the platform can move vertically up and down through driving