Laminator with paper winding sensing device

The utility model relates to a laminator with a paper winding sensing device, which comprises a machine body, an idler wheel group, at least one actuating piece, at least one sensor and at least one guide piece. The machine body comprises an inlet, an internal containing space and an outlet which are mutually communicated. The idler wheel group is arranged in the internal containing space and comprises an upper idler wheel and a lower idler wheel, and channels corresponding to the inlet and the outlet are arranged between the upper idler wheel and the lower idler wheel in separating mode. The actuating piece is arranged in the internal containing space and between the idler wheel group and the outlet, the sensor is arranged in the internal containing space and adjacent to the actuating piece, and the guide piece is arranged in the internal containing space and communicated with the channels and the actuating piece. Therefore, the laminator is capable of sensing the condition of the paper winding of the lamina