Abstract: An original drawing edition system based on object-oriented and multi-layer concept is designed and realized in order to improve efficiency and make it easy to memorize knitting signs of computerized flat knitting machine.The new system provides so abundant pattern edition tools that pattern becomes simple and flexible to input and edit and display.In addition,it provides independent yarn colour palette,weave database,transfer database,election of quantity of transfer needle and jacquard pattern database.As a result,the new method alleviates the burden of pattern technologists in the memory knitting sign.The convenience of drawing and design is maximized.Program and looming draft are produced automatically during edition to make pattern design fast and accurate.The system provides users a direct and friendly interface by combining window instruction with menu programme.