Abstract: The energy of sensor node is one of the key factors affecting the lifetime of wireless sensor network. Greedy algorithm in GPSR protocol ignored the influence of angle in the next hop selection. When there is a forwarding failure, only a peripheral edge forwarding algorithm could be used to solve the problem, with the loss of node energy as the price. In order to save energy of the sensor nodes and prolong the network life cycle, the algorithm, the problem of void in the route was solved from the distance and the angle in this study. Simulation results showed that the improved protocol greatly reduced node energy, and the network lifetime was 300 s, which was longer than before. The protocol can shorten the length of path, save node energy, reduce the consumption of energy and prolong the network lifetime.