Abstract:: From the perspective of a specific supply chain enterprise, four kinds of knowledge is distinguished, which are internal explicit knowledge, internal tacit knowledge, external explicit knowledge and external tacit knowledge. With internalization and externalization of knowledge, supply chain knowledge transformation is extended to eight kinds of model based on SECI, which are local explicitation of external knowledge, local explicitation of internal knowledge, combined internalization, combined externalization, local implicitation of internal knowledge, local implicitation of external knowledge, societal externalization, societal internalization. This paper draw a conclusion that is knowledge transformation can be with any knowledge form as the starting point and can be in a clockwise or counterclockwise or both parallel manners. Through knowledge transformation, supply chain knowledge management is carried out effectively and knowledge innovation is achieved.