The invention discloses a brush coating disc for uniformly coating plywood. The brush coating disc comprises a glue coating disc, a glue coating brush is arranged on the lower side of the glue coatingdisc, a motor is arranged on the upper side of the glue coating disc, the lower end of a rotating shaft of the motor vertically penetrates through the upper side of the glue coating disc and is vertically and fixedly connected with the upper end of the glue coating brush, the lower side of the glue coating disc is provided with a built-in circular ring groove, an arc-shaped ring is arranged in the built-in circular ring groove, the lower side of the arc-shaped ring is fixedly connected with the upper sides of the two ends of a brush through connecting rods, a glue storage cylinder is arrangedon one side of the motor, a piston is arranged on the inner side of the glue storage cylinder, and a movable rod is arranged on the upper side of the piston. The glue coating brush is driven to rotate through the motor, so that the arc-shaped ring fixedly connected with the glue coating brush is rotated, a pulley attached to the arc-shaped ring slides, then an inclined surface cylinder moves up and down, and regular glue discharging is facilitated.