Large-scale P2P communication of blockchain nodes is of low efficiency and poor stability，which is difficult to support industrial application. To make the scale of the blockchain industry bigger，it is necessary to build a set of blockchain-oriented public network infrastructure to improve the flexibility and convenience of the blockchain service，it will accelerate the development of the blockchain industry. This report first analyzes the architecture and characteristics of Internet network technology with high concurrency and low latency，as well as the performance problems of blockchain peer-to-peer network. Combining with several blockchain-oriented network optimization projects，it can be seen that blockchain engineers have made a variety of attempts by referring to Internet network optimization technologies and concepts. In the face of the challenge of large-scale blockchain network communication，AntChain designed a set of network system supporting blockchain communication acceleration and service expansion—BTN （Blockchain Transmission Network）. Technically，BTN defines the Routeable Blockchain Message Protocol，which，combined with network optimization technology，realizes high-performance communication. At the same time，the security and neutrality of blockchain network infrastructure are supported，and the basic characteristics of peer-to-peer of blockchain nodes are maintained. Blockchain network infrastructure contributes to the improvement of industrial scale and the formation of value communication network. It is a direction worth exploring from both the perspective of technology and the perspective of industrial development.