The invention relates to a glue spreading device, in particular to a glue spreading device for a board. The glue spreading device has the advantages that glue can be spread quickly, and the viscidityreduction of the glue can be avoided. According to the technical implementation scheme, the glue spreading device comprises a base, a trough plate, a movable plate, a fastening bolt, an inching switch, a top plate, a control box, a starting switch, a driving motor, a first bearing pedestal, a screw rod, nuts and the like; the rear side of the top of the base is fixedly connected with the trough plate which is internally provided with the movable plate, and the upper part of the front side of the trough plate is provided with the fastening bolt; and the inner bottom of the trough plate is provided with the inching switch. According to the glue spreading device, the glue in a compression cylinder can be pushed through a piston, so that the glue in the compression cylinder flows out through adischarging pipe; the glue falls onto the board for glue spreading; in this way, the glue can be spread quickly, and the viscidity reduction of the glue can be avoided; and the situation that air enters a discharging pipe and consequently the glue in the discharging pipe is solidified can be avoided through an anti-dry device.