Abstract: For the problem in the LEACH(low energy adaptive clustering hierarchy) protocol that the cluster heads die early caused by too much energy consumption of the cluster heads as the result of the one-hop transmission way from nodes to the heads,a new energy-saving multi-hop routing protocol based on clustering is proposed.Cluster heads transmit data to the base station in the multi-hop way to avoid the problem that cluster heads consume excessive energy by one hop.Simulation results based on NS-2(network simulator-version 2) show that the algorithm does better than LEACH,and can lower the energy consumption of the node effectively and prolong the network's lifetime.