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Traditional information assurance system has many problems, such as poor support effect and long time consuming. In order to solve this problem, the design and implementation of space digital information support system for space situation is put forward. According to the design requirement of space information security system, will guarantee the overall system is divided into comprehensive database, target track model, spatial elements and visual structure, using the space situational composition information system hardware design hierarchy; program as the basic research unit, design data roaming and zoom request process, and the use of information security technology, implementation of each application function. The experiment shows that the system can effectively cover the secret time and space and so on. It has better information security and less time.