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The unbalanced node energy of traditional AD Hoc routing protocol causes alarger network energy,and it reduces network lifecycle.The article presents a energy optimization of Ad Hoc Network Routing Protocol (EOARP protocol) from the point of energy balance.Through the introduction of public economics Lorenz index to the average energy consumption of each node in the network,combined with the busy degree in communication and residual energy of nodes to establish cost functionPEQ.Select residual energy of the node relatively high,communication link routes is lesser busy, so as to achieve a energy-balanced network.As the simulation results EOARP routing protocol has improvement indexs such as data transmission performance, energy balance, and network node residual energy, so effectively prolongs the network life cycle.