Paper shredder is a kind of common office supplies which is frequently used in various offices in the society and is conductive for disposal of waste paper and files upon the different needs of people The cutting tool of the shredding paper is the vital part of paper shredder Jingrui Electric Hardware Product CO., LTD is dedicated to the research and development of the blade of paper shredder and a large amount of manpower as well as material resources are invested for the research and development of "esearch on blade of paper shredder and application of processing technology" for 12 years Engineering technology is adopted and the processing optimization is utilized to continuously improve the productivity and quality of the product, which offers all effective means for human being to solve the resource, energy and environmental crisis to be coped with currently The high-effective productivity, high quality and low cost of the products become the key of the paper shredder The followings are the achievements of our company in the core parts of the cutting tool in theseries product of paper shredder.