According to the problem of the isolated information and the risk of construction of information in power information systems， and based on digital power system theory， a new base platform on digital power system is built. Connecting all kinds of different structure systems by the common object request broker architecture（CORBA） middleware technology， this platform can achieve the business exchange and data share among all the professional systems of power enterprises. The construction of the base platform on digital power system and relative implementing technologies are introduced， including digital power system bus， data integrity on the base of the common information model（CIM）/component information specification（CIS）， modeling of digital power system business， tools of development and management， etc.