Firmware upgrading method and device of full-link dual-verification mechanism, equipment and medium

The invention provides a firmware upgrading method and device of a full-link dual verification mechanism, equipment and a medium, and the method comprises the steps: carrying out the link dual verification of a firmware upgrading process of target link equipment through the link dual verification mechanism; and safe and reliable firmware upgrading security policy and function updating iteration of the link equipment in the whole life cycle can be ensured without additionally increasing cost. The firmware upgrading process of all link devices on the link is planned as a whole through the link terminal device, and the full-link upgrading capacity is achieved, so that the link devices connected with the link terminal device have a unified and efficient firmware upgrading mechanism; through a dual verification mechanism, all upgrading processes of the link equipment are subjected to dual verification, so that the security of the upgrading processes is ensured, the error rate is reduced, and the firmware upgrading