The invention discloses an improved GPSR routing method for a vehicle-mounted short distance communication network. The method comprises the following steps: sending heartbeat information including driving direction, vehicle position and the like among the nodes at regular intervals, updating and maintaining environmental information column including related information of surrounding nodes; sending a data package to a target node by a source node, the forwarding process for the data package is as follows: the source node finds the environmental information column, finds the node which is closer to the target node from the vehicle-mounted nodes driving in the same direction, if finding, sending the data package to the node which drives in the same direction, otherwise, finding finds the node which is closer to the target node from the vehicle-mounted nodes driving in opposite direction, if finding, sending the data package to the node which drives in opposite direction, otherwise, finding whether the road side node is at present or not, if the road side node is at present, sending the data package to the road side node, or else, caching the data package and finding again. The improved GPSR routing method for the vehicle-mounted short distance communication network can effectively solve the routing failure problem caused by meeting communication cavity of GPRS and enable to obtain good effect while the GPRS is applied to V2X network.