The invention belongs to the technical field of cigarette auxiliary equipment, and relates to an automatic cutting device of filter sticks. The device comprises a protection shell, a filter stick feeding disc, a cutting motor, a feeding disc motor, a baffle bar, a filter stick eliminating jaw, a cutting blade and a cutting motor plate; and the whole set of device is aslant placed by 40 degrees, and is provided with eight different groove positions for synchronously processing eight filter sticks with different peripheries in batches. The automatic cutting device of the filter sticks is high ingenerality and high in safety and efficiency, and realizes full-automatic cutting of cigarette filter sticks.