The invention belongs to the field of automatic spraying equipment, and particularly discloses a wooden door painting device. The wooden door painting device comprises a rack, and further comprises a roller couple, a first magnet arranged at the bottom of a wooden door, and a paint cylinder, wherein the roller couple is arranged at the upper end of the rack, the paint cylinder is arranged in the middle of the bottom of the rack, a paint pipe communicating with the roller couple is arranged on the paint cylinder, a cavity for a wooden door to pass through is formed between the rollers in the roller couple, a plurality of press type paint outlet mechanisms are evenly distributed on the surface of each roller in the roller couple circumferentially, and paint outlets are formed in the outer wall of each roller in the roller couple. Each press type paint outlet mechanism comprises a spring seat, a connecting rod, a spring, a through hole for the connecting rod to penetrate through, and a sealing plate which can block off the corresponding paint outlet from the inner side of one roller in the roller couple, wherein the spring seat is movably connected with one end of the corresponding connecting rod, the other end of each connecting rod penetrates through the corresponding through hole to be connected to the corresponding sealing plate, and the spring is connected between the corresponding spring seat and the outer wall of the corresponding roller in the roller couple. With the wooden door painting device, the two surfaces of one wooden door can be painted synchronously, painting is more uniform, and the painting efficiency is high.