A lamination device, comprising: a main member; an input slot on a front side of the main member; an output slot on a back side of the main member opposite to the input slot; a left plate inside the main member and adjacent to a left side of the main member; a right plate inside the main member and adjacent to a right side of the main member opposite to the left plate; a first input shaft inside the main member adjacent to the input slot whose two ends pivotally joined to the left plate and the right plate, respectively; a second input shaft inside the main member adjacent to the input slot whose two ends pivotally joined to the left plate and the right plate, respectively; a first output shaft inside the main member adjacent to the output slot whose two ends pivotally joined to the left plate and the right plate, respectively; a second output shaft inside the main member adjacent to the output slot whose two ends pivotally joined to the left plate and the right plate, respectively; a power element inside the main member coupling and engaging the first output shaft and second output shaft; a first transmission belt surrounding the first input shaft and first output shaft; a second transmission belt surrounding the second input shaft and second output shaft; and a plurality of heater members inside the main member and respectively surrounded by the first transmission belt and the second transmission belt, where each heater member comprises a heating element and a pre-heat piece wrapping the heating element, such that heat produced from the heating elements is conducted to the first transmission belt, the second transmission belt, and the pre-heat pieces, wherein the left plate is configured with a left elastic member; and the left elastic member comprises a left stretching element laterally contacting left ends of the first input shaft and the second input shaft, and a plurality of left elastic elements laterally pressing the left stretching element, and wherein the right plate is configured with a right elastic member; and the right elastic member comprises a right stretching element laterally contacting right ends of the first input shaft and the second input shaft, and a plurality of right elastic elements laterally pressing the right stretching element. a main member; an input slot on a front side of the main member; an output slot on a back side of the main member opposite to the input slot; a left plate inside the main member and adjacent to a left side of the main member; a right plate inside the main member and adjacent to a right side of the main member opposite to the left plate; a first input shaft inside the main member adjacent to the input slot whose two ends pivotally joined to the left plate and the right plate, respectively; a second input shaft inside the main member adjacent to the input slot whose two ends pivotally joined to the left plate and the right plate, respectively; a first output shaft inside the main member adjacent to the output slot whose two ends pivotally joined to the left plate and the right plate, respectively; a second output shaft inside the main member adjacent to the output slot whose two ends pivotally joined to the left plate and the right plate, respectively; a power element inside the main member coupling and engaging the first output shaft and second output shaft; a first transmission belt surrounding the first input shaft and first output shaft; a second transmission belt surrounding the second input shaft and second output shaft; and a plurality of heater members inside the main member and respectively surrounded by the first transmission belt and the second transmission belt, where each heater member comprises a heating element and a pre-heat piece wrapping the heating element, such that heat produced from the heating elements is conducted to the first transmission belt, the second transmission belt, and the pre-heat pieces, wherein the left plate is configured with a left elastic member; and the left elastic member comprises a left stretching element laterally contacting left ends of the first input shaft and the second input shaft, and a plurality of left elastic elements laterally pressing the left stretching element, and wherein the right plate is configured with a right elastic member; and the right elastic member comprises a right stretching element laterally contacting right ends of the first input shaft and the second input shaft, and a plurality of right elastic elements laterally pressing the right stretching element.