Building environment-friendly wallboard mounting device

The utility model relates to a building environment-friendly wallboard installation device which comprises an L-shaped plate, two circular columns are arranged in an inner sliding connecting piece of the L-shaped plate, a bottom plate is fixedly connected between the bottoms of the two circular columns, an automatic lifting column is fixedly connected between the bottom of the L-shaped plate and the bottom plate, and strip-shaped through grooves are formed in the two ends of the top of the bottom plate. Strip-shaped plates are arranged at the two ends of the bottom of the bottom plate correspondingly, an adjusting assembly is arranged in the strip-shaped through groove and used for driving the strip-shaped plates to move, a support transverse plate is rotationally connected to one side of the L-shaped plate, a circular plate is fixedly connected to the outer side of the support transverse plate, and a first groove and a second groove are formed in the outer side of the circular plate; a strip-shaped rod is sl