Abstract: The optimization problems for transmission performance of wireless mesh networks (WMN) focus on the issues as system throughput, average delay and transmission fairness, etc. It is an NPhard problem. This paper proposed an iterative optimization algorithm based on heuristic and primaldual algorithms which optimize the system throughput under the constraints of channelradio and link capacity. It also analyzed the convergence of the proposed algorithm. The simulations show that this algorithm can largely increase the system throughput of WMN.