The invention relates to a novel media access mechanism and channel cooperation method for an MAC layer of Internet of vehicles and belongs to the technical field of Internet of vehicles. The method comprises the following steps that an RSU drive test unit is repositioned to enable a network to balance and schedule and distribute resources reasonably; a new time slot region is divided, the adaptability is better while the performance requirements are met, even if the vehicle node density reaches a saturation value, the secure message transmission can be also guaranteed to a certain degree; through a non-timely and asynchronous reserved communication mode, more channel resources are saved, and meanwhile, the interference and the collision of different messages are avoided; and a strategy for active compensation is provided, so that the reliability of the secure message transmission is further enhanced. Through a control unit, unified management is carried out on the whole WBSS network resource and information; in comparison with the conventional IEEE1609.4 channel cooperation mode, the safety performance is improved to a larger extent, and the idle channel resources are further utilized on the basis of avoiding the data collision.