Abstract: Feature modelling is the key issue to integrate information in CAD／CAM and even in Concurrent Engineering．Unified feature modelling technique is a hybrid of feature-based design and feature recognition．In design stage，a part is described by initial features with four information models．When the downstream applications begins． those initial features are processed by feature recognizer and divided into applications specific features．The complete information of a feature include attributes model，geometry model，dimensions model and constraints model．The features recognizer has realized on the basis of graph theory．Compared with those two traditional techniques，this new one has been proven successful in our CAD／CAM system for progressive die．