Abstract: The present invention provides a blade of a paper shredder, characterized in that the serrated cutting edge and the circular blade body are integrally formed from the base material, and the serrated cutting edge is formed by bending the periphery of the blade body; the serrated cutting edge has a front face bent from the periphery of the blade body, such that the width of the cutting edge is larger than the thickness of the blade body. The blade of the present invention requires simple processing and low material consumption, and the paper scrap from the shredder can be discharged smoothly.