The invention provides a cloth laminating device, which is used for laminating bottom cloth and surface cloth, according to specific lines, to form a fluff space therebetween, wherein hot melt films are laminated on the opposite surfaces of the bottom cloth and the surface cloth in advance. The device comprises a framework, and a bottom cloth hot roller, a surface cloth hot roller, a pattern roller and a pressing roller, which are rotatably arranged on the framework and are parallel. The pressing roller can move between a standby position and a working position; when in the standby position, the pressing roller and the embossing roller are arranged at intervals, and when in the working position, the pressing roller is attached to the embossing roller. The bottom cloth and the surface clothare correspondingly heated by the bottom cloth hot roller and the surface cloth hot roller and then enter the space between the embossing roller and the pressing roller; protruding lines are formed on the embossing roller. The embossing roller and the pressing roller are matched to apply pressure, so that the bottom cloth and the surface cloth are laminated at the lines. The invention further provides a cloth laminating method.