Abstract: Accurate transmission of remote control data is the foundation of power grid regulation, therefore ensuring the accuracy of transmission data is crucial. With the integration of more clean energy into the grid, the amount of transmitted data will increase significantly, so traditional manual and offline data check modes can no longer meet the current data check requirements. This paper proposes an online automatic check technology for remote control transmission data, which achieves automatic check of remote control data through sampling detection. In the internal Ethernet communication environment of the power grid, an automatic check platform is built to achieve automatic reception of the main and plant station tables. Subsequently, the backend program of the platform implements time section homogenization and extracts effective information from the point table, and then completes data check through a direct check algorithm. Through experimental check of the actual point table of a certain main and plant station, a direct check algorithm with higher accuracy and speed than cyclic redundancy check was selected to check the effective information after point table processing. The simulation check results show that the proposed online automatic check technology for power remote control transmission data not only achieves closed-loop automatic check process, greatly improving check efficiency, but also achieves end-to-end check of remote control transmission data, greatly improving the timeliness and reliability of check results.