Processing method and system for one vehicle passing along with abnormal vehicle in ETC lane

The invention provides a processing method and system for one vehicle to pass by following an abnormal vehicle in an ETC lane. The method comprises the following steps: if a first detection signal passing through a first vehicle detector is not received when a first vehicle is not acquired from a vehicle-mounted electronic unit, adding a first vehicle element of which the state is an abnormal vehicle, triggering the action of capturing and identifying the first vehicle, and outputting charging alarm information to remind people of charging; obtaining vehicle information of a second vehicle following the first vehicle, adding a second vehicle element, completing a transaction, and marking the second vehicle element as a legal vehicle; when the manual charging result is not received, receiving a second detection signal that the first vehicle passes through the falling rod vehicle detector, and generating a breakthrough record according to the snapshot identification result of the first vehicle; deleting the fir