The Internet of Things technology is widely used in all aspects of power. In this paper, a deep analysis method is proposed for the message data of power Internet of Things terminal. The message data of power Internet of Things terminal is collected without disturbance through data mirroring, the hierarchical relationship of protocol tree is constructed, and the collected message data of power Internet of Things terminal is analyzed layer by layer according to the hierarchical relationship of protocol tree. Protocol reverse engineering is used to process the analyzed data, obtain the communication protocol of the electric iot terminal, and extract the meaning of the operation instruction generated in the communication process. The meaning of the operation instruction includes the behavioral meaning of the device instruction and payload data. At the same time, the model takes into account the undisturbed acquisition, real-time analysis and deep analysis of message parsing, effectively realizes the global iot management, and has portability, which can realize the scalability and consistency of the capacity expansion of electric iot terminal equipment, provides strong technical support for the automatic registration of electric iot terminal equipment and the rapid online service, and improves the work efficiency of electric iot terminal equipment.