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In this paper, we study the security data exchange model between the public security information network and other networks, and propose a design scheme of data security transmission control system. The underlying hardware design is based on the characteristics of one-way light transmission, which can ensure the one-way safe transmission of data, and realize the physical isolation between networks. In order to ensure the integrity, confidentiality, reliability and content compliance of the transmission data, we adopt the integrity check, data encryption and decryption, data re-transmission, virus scanning, content filtering and other technologies in the upper system design. The whole system is composed of channel resource scheduling, channel resource reporting, channel task management, queue task management and main task management. It can realize the functions of device information registration, device status reporting, channel task management, security access control, monitoring and auditing. Meanwhile, the proposed system can meet the security and efficient transmission of file data, stream data, database data and request service data between different networks.