Being characterized by digitization, informationization and intelligence, the digital Changjiang is an important support to realize the modernization of Changjiang shipping. With the accelerating pace of the construction of Changjiang waterway digitization, Changjiang ENC has now come into more widespread use.According to the practical experience of version 1.0 Changjiang ENC, this paper elaborates the architecture of CARIS HPD and the construction method of Changjiang ENC source data. Moreover, problems existing in practical production are discussed.