The invention discloses a gluing device for a sandwich board combination machine. The gluing device for the sandwich board combination machine comprises supporting rods. Rollers are rotatably connected to the upper portions of the supporting rods. A core board is arranged on the rollers. A first supporting frame is arranged on one side of each supporting rod. A first connecting base is arranged between the first supporting frames. A glue storage box is arranged on the first connecting base, a glue return port is formed in the upper portion of the glue storage box, and a heating device is arranged on the left side of the glue return port. A booster pump is arranged in the glue storage box. A water pipe is connected to the output end of the booster pump and communicates with the heating device. A second connecting base is arranged on the upper portions of the first supporting frames. Glue in the glue storage box is pumped through the pressure of the booster pump and then sprayed onto bristles on rolling shafts from spray heads; if the glue needs to be heated when used for bonding, the heating device is started to heat the glue in the box, and the glue in the water pipe is sprayed after being heated; and a first cylinder can rise and fall to adjust the distances between the bristles on the rolling shafts and the core board as well as the pressure between the rolling shafts and thecore board.