Because of characteristic of self-organization

multi-hop and limited resources of WSNs which make messages transmission for one-to-many or many-to-many become extremely difficult

and multicast has the advantages in limited bandwidth as well as resource scarcity and so on which the unicast and broadcast can not compare to

so it is widely researched.Propose multicast methods according to difficult point of view to solve the problem in wireless sensor networks

to classify research on these multicast methods

and list some typical multicast methods.Finally

form is used to present advantages and disadvantages of these multicast methods in different performance qualities.