In the applications of wireless sensor networks

multicast plays a very important role.In both military and civil domain

we usually need the multicast support.It is very hard to design an efficient multicast protocol for wireless sensor networks

because many factors have to be taken in consideration

such as the energy which is a vital factor for wireless sensor networks.Aimed at the restricted energy in wireless sensor network

a reliable link multicast routing(RLMR) protocol by finding the shortest path between two nodes is proposed in this paper.The energy of nodes and the link reliability between two nodes are considered in RLMR.Two factors are deemed as the link reliability indexes.As the more energy and nearer nodes take on more transmission tasks

the data stream route option is optimized

the energy consume of nodes is balance and the network life periods is extended.The simulation proves the validity of Reliable Link Multicast Routing protocol.The multicast in RLMR becomes more reliable.