Industrial Internet is the foundation of networking and digitization of industrial manufacturing. Since the notice on accelerating the development of industrial Internet was put forward，the information infrastructure and innovation of industrial Internet have entered the fast lane of development. As an emerging technology in the new infrastructure，blockchain has the characteristics of collective maintenance，tamper proof，multi-party consensus，traceability and so on. It is an important infrastructure to realize the digital，networked and intelligent development of the industry. It helps to solve the problems of traditional industrial data sharing，right confirmation and circulation，industrial chain process traceability and industrial collaboration. The public service platform of industrial Internet based on blockchain can realize the credible collection of data，controllable and credible transfer of knowledge achievements，which is conducive to the transformation and upgrading of industrial Internet industry to clustering and digitization，truly realize the link of the whole industrial chain，give play to the value of data as the core production factor，and promote the formation of a new ecosystem of new industrial production and service system.