The invention discloses a static paper head bidirectionally cutting-off device of a cigarette making machine. According to the cutting-off device, corresponding air cylinder are arranged above and below the part, where the head of a piece of to-be-used paper is cut off, of the cigarette making machine; driving blocks are arranged on the heads of the two air cylinders; rack-shaped static cutters are arranged on working surfaces of the two driving blocks; on the various driving blocks, a fixed hanging plate is arranged on the outer sides of oscillating push blocks; a right-angle sliding block, with head facing the fixed hanging plate and back to the oscillating push blocks, is arranged between the fixed hanging plate and the oscillating push blocks; a pull pin is arranged on the inner side of the lower part of the right-angle sliding block; the part, where the head of the original paper is cut off, of the pull pin is provided with a herringbone oscillating cutter holder; rack-shaped movable cutters, with blades matched with the static cutter, are arranged at the front ends of the oscillating cutter holder; mechanical handles are arranged between the oscillating cutter holder and the oscillating push blocks in a matched mode; and sliding push blocks, which are matched with two outer walls of the right-angle sliding block in a sliding mode, are arranged on the upper and lower oscillating push blocks by virtue of mounting arms. By virtue of the cutting-off device disclosed by the invention, human resources are saved; and meanwhile, working efficiency is improved.