Based on the process of cooperation product design, the representation form of knowledge has characters of complexity,diversity and uncertainty. Analyzing the concept of pattern language, applying of information theory and fuzzy comprehensive evaluation method,a saved table structure is proposed for design knowledge description method and knowledge description based on pattern language, a model is founded for knowledge discovery and knowledge fuzzy comprehensive evaluation based on pattern language. Examples of the design of blanking die, the feasible and practical of basing on pattern language design knowledge description and save method is validated.
