The invention discloses a wood surface spraying device. The wood surface spraying device comprises a bottom frame; a movable mechanism is arranged on the outer surface of the bottom frame which is provided with a paint spraying cutting mechanism; the bottom frame is provided with a surface paint spraying mechanism and a panel side end face clamping mechanism; the paint spraying mechanism is located one side of the paint spraying cutting mechanism; the surface spraying mechanism is jointly composed of a pair of slide rails arranged on the upper end face of the bottom frame, sliding pieces arranged in the slide rails, a fixing frame arranged on one of the sliding pieces, an electric push rod arranged on the fixing frame, a cylinder clamping piece fixed to the other sliding piece and used for being matched with the telescopic end of the electric push rod, a spraying rolling brush arranged on the electric push rod in a sleeving manner, and a multi-stage telescopic cylinder installed in the slide rails; and the panel side end face clamping mechanism is jointly composed of single-action type cylinders arranged on the center parts of the opposite side surfaces of the pair of slide rails, and a cylinder clamping piece installed at the piston end of the multi-stage telescopic cylinder. The wood surface spraying device has the beneficial effects of being simple in structure and high in practicability.