Abstract: The development and innovation of Internet technology have made information technology have a greater impact on people's production activities. At present, the popularization and application of all-in-one card systems in campuses are expanding, but its security needs to be improved. If you want to reduce network security hazards, it is recommended to maintain campus network security and introduce network security equipment technology during the construction of the campus all-in-one card to resolve the crisis of teacher and student property safety and information leakage. Based on this,this article outlines the campus all-in-one card system, analyzes its security risks, and explores the technical content of campus all-in-one card network security equipment around encryption technology, anti-virus technology, and firewall technology. Research has found that the application of advanced all-in-one card network security equipment technology can achieve the coordination of multiple security strategies, highlighting the operability of the all-in-one card system. Provide convenient services for school teachers and students with the help of VLAN and VPN. Filtering the MAC address protocol, IP address and other content involved in the network communication stage can resist virus attacks and malicious attacks. Shield the frequent access ports of viruses, expand legal channels for data exchanges for network users, reduce system operating costs, and give play to its predictability and timeliness. Realize the digital development of the all-in-one card system by retaining the expansion interface, so that it can achieve the goal of terminal digitization and intelligent management and settlement, protect and isolate the campus all-in-one card system, and provide technical services for education reform.