Aiming at the efficiency and credibility of data feed in power blockchain application system,the trusted data feed technology based on 5G and Oracle mechanism is studied. Firstly,the data feed method in the blockchain system is discussed,and the Oracle data feed method applicable to the power 5G blockchain is analyzed. Secondly,the trusted data feed technology of the power 5G business system based on distributed Oracle is proposed,and the overall system architecture based on cloud-edge-terminal integration is designed,as well as the workflow of data source registration,evaluation and on chaining. Among them,the distributed data collection and sharing are realized through the blockchain system,and the data source evaluation is realized based on threshold signature algorithm and verifiable random function. The evaluation algorithm is run by the edge Internet of Things (IoT) agent node to ensure the security and availability of the system. Through the division and optimization of 5G slice tasks,the efficient transmission of authentication data and business data is achieved. Finally,the proposed scheme is deployed in the electricity 5G blockchain based power information acquisition system,and experimental verification is carried out from the aspects of communication performance,business performance,resource utilization,etc. The results show that the average data transmission delay of the proposed scheme under different load stress tests is about 10 ms,and the bit error rate and packet loss rate are less than 0.9%. In the case of 100-level concurrent service requests,the performance of the scheme is improved by more than 80% compared with the existing schemes,so it has good feasibility and promotion value.