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The paper analyzed the performance deficiency of traditional routing protocol basing on the actual geographical setting, and proposed a novel adaptive greedy geographical routing protocol. Through analyzing two factors affecting networks mobility- the moving speed and the pause time of nodes, the protocol adjusted the beacons sending cycle and selected the better next hop to achieve the goals of reducing overload and increasing delivery success ratio. Simulation results show that the protocol can acquire better effect compared to GPSR(greedy perimeter stateless routing).