The transformation of the steel industry from “manufacturing” to “smart manufacturing” is inseparable from the industrial Internet，5G，big data，cloud computing，artificial intelligence，and support of platform. These technologies result in the achievement of basic automation，connection of equipment，unmanned operations，control automation，real-time synchronization of production and management information，production-marketing coordination，and dynamic market forecast. The establishment of an industrial Internet platform provides smart equipment，smart factories，smart operations，and helps the steel industry realize a collaborative ecosystem and digital transformation. Network is the prerequisite for the realization of the Industrial Internet and digitization of the steel industry. The transition from wired-based to wireless-based connection and replacement of traditional multiple access methods with 5G+ fiber coexistence mode，jointly create a low-latency，highly reliable basic network.