Abstract: The current routing protocols in the Internet only support “best effort service”. New applications, such as videoconference and distributed emulation, need guaranteed quality of service. Resource reservation protocols such as RSVP are used to guarantee the quality of service, but they need new routing protocols to cooperate with them. In the paper here, routing algorithms for multipoint to multipoint communication supporting resource reservation are studied. Two routing schemes are proposed. Using the routing algorithm 2, a feasible communication distribution tree can be constructed. Since algorithm 2 adopts the mechanism that avoids using the high load links, more communication distribution tree can be allocated in a network. Simulation results and their analysis are also given.