The invention discloses a surface leveling device for processing wood products, comprising: a frame, the frame includes a bottom plate, a fixed plate and a column, the bottom plate is used to fix and place plates, and the fixed plate is fixedly arranged on the set by the column above the base plate; a grinding assembly, the grinding assembly is arranged above the base plate, for grinding and leveling the plate; a level adjustment assembly, the level adjustment assembly is arranged under the fixed plate, and the level adjustment assembly The lower end is equipped with a sliding seat, and the horizontal adjustment assembly can adjust the position of the sliding seat horizontally; the telescopic element, the upper end of the telescopic element is fixedly connected with the sliding seat, and the lower end is fixedly connected with the grinding assembly. Compared with manually controlling the horizontal movement of the grinding machine, the mechanized structure can make the horizontal movement of the grinding component more stable, and can fully realize the horizontal movement, thereby improving the flatness of the plate grinding.