The invention provides a control method and a control device for a multi-vehicle group to pass through a traffic light intersection, and the method comprises the steps: when a head vehicle in the multi-vehicle group detects that there is an intersection in front, the head vehicle transmits vehicle group information to a roadside facility through V2I direct connection; the roadside facility obtains
road condition information, and carries out integrated analysis according to the
road condition information and the vehicle team information to obtain an optimal driving
route and driving state of the vehicle team passing through the intersection; and the roadside facility sends the optimal driving
route and driving state of the intersection to the whole multi-vehicle group through V2I direct connection, and all vehicles in the multi-vehicle group run through the intersection according to the optimal driving
route and driving state. According to the invention, the running state of a multi-vehicle group completely passing through the traffic lights is calculated in advance, group vehicle speed guidance is provided, and the problem of how to regather after the vehicle groups pass through the traffic lights separately is solved; the team travel
information sharing efficiency and the travel efficiency can be greatly improved.