To achieve automation and informationization of distribution operational control and management， comprehensive information integration is necessary. According to multi-source information integration， the information exchange mode among systems related to distribution management is analyzed， and the architecture of the integrated information system is designed. A scheme for information integration of the distribution automation and management system based on the enterprise service bus（ESB） is proposed， which is in accordance with the idea that IEC 61968 standard is intended to facilitate inter-application integration， with abstract middleware services of the various distributed software application systems supporting the management of electric utility distribution networks. It is pointed out that establishment of service-oriented architecture（SOA） based power ESB is the ideal solution for resolving distribution automation information integration. In this way， the existing applications of power systems can be integrated or inherited， and the expansion of new business systems can also be facilitated with good dynamic scalability.