Display board capable of adjusting height and expanding display area

The utility model relates to the technical field of announcement article display, and discloses a display board capable of adjusting height and expanding display area, which comprises a base, the top of the base is fixedly connected with a support column, the top of the support column penetrates through and is provided with a through groove, both sides of the support column are provided with mounting grooves, and the mounting grooves are internally provided with limiting components. An adjusting column is slidably connected into the through groove, limiting racks are fixedly connected to the two sides in the adjusting column, a sliding groove is formed in the outer wall of the rear side of the supporting column, a sliding block is slidably connected into the sliding groove, and a movable plate is fixedly connected to the rear side of the sliding block; according to the display device, the extension plate, the second limiting groove, the second plastic plate, the second placement opening, the limiting hole and