Abstract: In view of the delaying waiting time,energy saving ratio and throughput rate in Wireless Sensor Networks,the multicast routing problem is restricted,and a multicast routing algorithm based on the state distributed sensing network (SDSMR) is proposed.The algorithm structure contains the cluster head (CH) node,core node (CNs) and sensor nodes (SNs),where CH and CNs constitute the core nodes of the network nodes.CNs and SNs in the core node network constitute the multicast tree supported by the core node network.CH nodes can perform topology control,routing and monitoring the energy state of SNs.CNs stores multicast routing state information,which can minimize routing complexity during link failure.SNs takes part in multicast routing supported by core node network,saves energy consumption of CNs,and improves the performance of the whole network.Among the SDSMR algorithm,the HGMR algorithm and the DCAMEM algorithm,the simulation results show that the SDSMR algorithm can effectively reduce the latency time,improve the energy saving ratio and throughput,and exhibit good performance.