In the multibeam satellite downlink

the realization of high data rate and low power consumption restrict each other

which is one of the important factors that affect the communication performance of the multibeam satellite system. The two-stage multibeam satellite downlink multi-objective power allocation method is proposed. The multibeam satellite downlink power allocation model is built. In the first stage

a convex optimization algorithm is used to achieve downlink data rate matching

and the data rate matching solution is employed as the initial solution of heuristic algorithm in the second stage. The optimized performance is represented by the obtained Pareto solution

which provides a balance for the link data rate and power consumption. The numerical results show that under the same data rate

two-stage optimization method reduces link power consumption by 17.6% and the propose method converges fast.