Multifunctional desk with adjustable desktop area

The utility model discloses a multifunctional desk with an adjustable desktop area. The multifunctional desk comprises a main desk plate and a supporting unit, a desk bucket is arranged on the lower surface of the main desk board, desk legs are symmetrically arranged on the left and right side faces of the desk bucket, and rotating shafts are arranged in mounting holes in the rear end of the main desk board and rotationally connected with long sliding grooves in the left and right ends of the auxiliary desk board respectively; the supporting unit comprises sliding seats and a supporting shaft, the sliding seats are symmetrically arranged on the rear side face of the main table board, long sliding holes of the two sliding seats are in sliding connection with the two ends of the supporting shaft respectively, the supporting shaft is located on the lower surface of the auxiliary table board, the supporting unit further comprises gears and racks, the racks are symmetrically arranged on the rear side face of the m