OTA flashing method and device, equipment and medium

The invention discloses an OTA flashing method and device, equipment and a medium. The OTA flashing method is applied to an OTA flashing system in a non-signal scene, the OTA flashing system in the non-signal scene at least comprises an Internet of Vehicles unit, an electronic control unit, an offline data authorization unit and a plurality of auxiliary flashing units, and the offline data authorization unit is used for authorizing the offline data when a signal exists. Issuing engine data information of each target vehicle in the current area and issuing to-be-flashed data to the auxiliary flashed unit; the auxiliary flashing unit is respectively in interactive connection with the vehicle networking unit and the electronic control unit; the OTA flashing method comprises the following steps: acquiring to-be-flashed data issued by an offline data authorization unit; engine data information of the current target vehicle is obtained; acquiring required to-be-flashed data of the current target vehicle according t