在Ad hoc网络中节点随机移动的情况下，对二进制指数退避算法进行了分析，在此基础上提出了一种新的退避进制（newBEB），对新算法进行了仿真分析，仿真结果表明，新的退避算法能提高移动情况的Ad hoc网络的公平性．-In Ad hoc networks of mobile nodes random circumstances, of the binary exponential backoff algorithm analysis, on this basis proposes a new backoff hexadecimal (newBEB), a new algorithm for the simulation analysis, simulation results show that new backoff algorithm can improve the movement of the Ad hoc network fairness.