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With the rapid development of the Internet, big data, networking and other technology, in order to achieve the goal of Intelligent Manufacturing ”Internet plus industrial” action plan has opened the big screen. To meet the development needs of the smart plant, a real time and efficient, safe and accurate field data transmission of the joint control node has become the key. This paper is aimed at the disadvantages of traditional manufacturing plant communication system, such as low transmission rate, complex network construction, poor reliability, maintenance difficulties and so on. A power line carrier data acquisition node based on DL/T645 protocol is proposed, which is based on STM32 microcontroller, carrier transceiver module, node factory equipment interface hardware and to DL/T645 protocol as the core design linked nodes, security factory field data real-time acquisition, for the construction of the monitoring and management of the integration of the wisdom of plants provide high speed, strong real-time, high reliability of the communication system.