Abstract: WSN (Wireless Sensor Network) is increasingly applied to various situations of emergency communication, with such advantages as none-center, convenient building and lfexibility. However, its performance is severely limited by limitary nodes energy, high-energy-costing communication with low-energy-costing computation and so on. In this paper, on the basis of DCHS, we propose a new WSN uneven grouping routing algorithm of shortest path in view of link quality. After link quality is introduced in the communication cost function, we can get the shortest path with greedy algorithm when multi-hop communication occurs between cluster heads and base stations. In this way, we greatly improve the emergency communication performance of WSN with signiifcantly reduced energy.