BIM modeling auxiliary device

The utility model discloses a BIM modeling auxiliary device which comprises an outer column, an inner column is slidably connected in the outer column, a mounting block is arranged at the upper end of the outer surface of the inner column in a sleeved mode, a supporting plate is fixedly connected to the side face of the front end of the mounting block, a panel is rotatably connected to the front end of a top plate of the supporting plate, and a screw is rotatably connected to the middle of the front end of the supporting plate. The outer surface of the screw is in threaded connection with a sliding block, the outer surface of the front end of the sliding block is rotationally connected with a push-pull rod, the end, away from the sliding block, of the push-pull rod is rotationally connected to the rear side face of the panel, annularly-distributed tooth grooves are formed in the lower end of the outer column, a plurality of supporting legs are rotationally connected to the upper ends of the tooth grooves, and