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Clustering routing algorithm is an important and widely used method, which can prolong the lifecycle of WSN. Existing clustering algorithm due to the randomness of selecting the cluster head, it is inevitable that the agreement exists choosing cluster head unreasonable, node energy consumption unbalanced. To address the above issues, this paper presents an improved clustering routing algorithm LEACH-KED on the basis of the uniform clustering, and proceeds simulation analysis. The simulation results show that the improved algorithm is effective in extending the network life cycle.