The invention discloses an intersection routing method in a vehicle self-organized network on the basis of the path segment length. The method solves the problems that communication of a forwarding path cannot be guaranteed, and the route hop count is increased because the situation that the path segment length is smaller than the communication radius of wireless signals is not taken into consideration. The method specifically comprises the steps that first, an intersection node calculates the communication degree between every two adjacent path segments; second, a data packet is forwarded to an intersection node or a neighbor node closest to a target node according to the communication degree between very two adjacent path segments; finally, the process above is repeated till the data packet is forwarded to the target node. According to the intersection routing method in the vehicle self-organized network on the basis of the path segment length, the communication degree between every two adjacent path segments is calculated with different methods according to the path segment length, the intersection node which is communicated and closest to the target node is selected preferentially, the phenomenon that a data packet is forwarded to a path segment which can be easily interrupted can be effectively avoided, network delay is reduced, and the delivery rate of the data packets is increased.