The slideway design is the key in the design of the disc vibrating feeder.However,no reliable theoretical guidance has come into existence,which greatly restricted the application of CAD(Computer-aided design).In order to feed the application of CAD technology,we must make improvements to the existing coding method.Based on the similarity principle of Group Technology and existing coding system,a new coding method applicable to slideway design is brought forward.The existing coding system could get optimized by means of analysing and studying the influence imposed by the parts′ shape and posture features.More detailed information about the parts could be supplied by the new coding system,which makes the design simpler,more convenient and more accurate with the subjoin of the initial and targeted codes. The slideway design is the key in the design of the disc vibrating feeder.However, no reliable theoretical guidance has come into existence, which greatly restricted the application of CAD (Computer-aided design) .In order to feed the application of CAD technology, we must make improvements to the existing coding method. Based on the similarity principle of Group Technology and existing coding system, a new coding method applicable to slideway design is brought forward. existing existing coding system could get optimized by means of analysing and studying the influence imposed by the parts’ shape and posture features. Detailed information about the parts could be supplied by the new coding system, which makes the design simpler, more convenient and more accurate with the subjoin of the initial and targeted codes.