Digital basin, an important part of the modern water informatization, is the application of the “Digital Earth” in the basin scale. For better service of watershed management, this paper analyzed the situation and problems existing in the study of the platform of China basic information of digital watershed, the model simulation platform and the application platform of decision-making. By means of research and discussion of the Digital Construction in different basins, the paper aims at providing the reference for the informatization construction of current river basin.