Decorative wallboard

The utility model discloses a decorative wallboard which comprises a board body, a cavity is formed in the board body, viscous coating is filled in the cavity, a plurality of discharging holes distributed in an array mode are further formed in the board body, the cavity is communicated with the discharging holes, the inner side wall of the cavity is connected with an annular plug through an extrusion device, and the annular plug is matched with the discharging holes. An adjusting device is arranged on the plate body and is used for controlling the position of the coating in the plate body; viscous paint is arranged in the board body, when the board body needs to be used, the extrusion device and the adjusting device are matched with each other, the paint is evenly discharged from the discharging holes, one side of the board body is evenly covered with the paint, the problem that the paint is not evenly smeared manually in a traditional mode is solved, and a gap between a wall face and a wall board is reduced;