Full-link data self-diagnosis method and protection control device

The invention discloses a full-link data self-diagnosis method and a protection control device, and relates to the technical field of power system protection control, and the method comprises the steps: adding a self-check code of data content to collected external data, and obtaining collected data with the self-check code; packaging the collected data with the self-check code into target packaged data in an internal link layer bus message format, and sending the target packaged data to a main control plug-in of the protection control device; performing data verification on the acquired data with the self-verification code, and storing the acquired data subjected to data verification into a target memory; adding a self-check code to the exit data to obtain the exit data with the self-check code; and sending the outlet data with the self-check code to an acquisition board, stripping the self-check code after the acquisition board performs data check on the outlet data with the self-check code, and sending the