The invention provides a cooling structure of a support roller of laminating equipment, belongs to the technical field of machinery, and solves the technical problems of complicated cooling structures of support rollers of conventional laminating equipment and the like. The laminating equipment comprises a rack, the support roller rotationally connected to the rack and an upper compression roller; the cooling structure comprises a water cooler and a water spray tank, wherein the water spray tank is located below the support roller, the water cooler is arranged below the water spray tank, a water inlet of the water cooler is connected with a water inflow tube, the upper end of the water inflow tube communicates with the water spray tank, a water outlet of the water cooler is connected with a water outflow tube, a water pump is connected with the middle section of the water outflow tube, the upper end of the water outflow tube penetrates the water spray tank, a water distributing tube is fixed in the water spray tank, the water outflow tube penetrates one end of the water spray tank to communicate with the water distributing tube, a plurality of branch tubes are arranged on the water distributing tube, and sprinklers are fixed at ends of all branch tubes and face the support roller. The cooling structure has the advantage of being simple.