The invention discloses an integrated device capable of achieving rolling, heating, drying, positioning and leveling sizing synchronously during plate conveying. The integrated device is composed of a frame body, heating, pressurizing and leveling rollers, heating and conveying rollers, roller fixing groove frames, sliding bearing bases, fixed bearing bases, plate positioning idler wheels and chains. By means of the integrated device, heated liquid cyclically enters and exits from the heating, pressurizing and leveling rollers and the heating and conveying rollers, so that it is ensured that enough heat energy can be used for heating the two faces of a plate. The heating, pressurizing and leveling rollers can vertically fluctuate freely and automatically, so that it is ensured that the heating, pressurizing and leveling rollers and the heating and conveying rollers are attached to and roll the compound plate all the time, and rolling is even. The operation direction of the integrated plate is maintained in the operation process through the plate positioning idler wheels, so that it is ensured that the integrated plate is operated stably and does not deviate. By means of the integrated device, production can be conducted in dry or moist climate environmental conditions, the plate can be fed, dried and manufactured into a finished product meeting the quality requirement only within 40 minutes or so, the production period is short, and the dryness and humidity of the plate are easy to control.