With the rapid development of network technology, the amount of data generated by real-time system is increasing exponentially. Business applications are putting forward more and more high demand on the management and real-time requirement. As the traditional stand-alone RTDB technology has met the needs with difficulty, the distributed thinking is introduced into the RTDB field. It mainly studies from the Data distribution mode, data redundancy backup, data consistency, and other aspects, proposes a design of data distributed storage in real-time data system. This design can provide technical support for current RTDB scalability and reliability.