The data flow of spacecraft electronic information covers the telemetry data， tele-control data， internal communication data and related data processing rules， data transmission protocols， etc. It is a combination of the data and its processing methods and protocols. The design process of electronic information data flow involves a lot of people's cooperation and interaction， all of which rely on document as the main way of transmission and lack of technical means. In this paper， a collaborative design system for spacecraft electronic information data stream is introduced， which is based on the unity of data source， design tool and transfer mode. In this system, it is convenient for state control in fast iteration and the digital transmission in the whole process is realized， so the overall design ability of data flow and the level of collaborative design can be improved.