In order to take full advantage of NetworkonChip parallelism ability and improve network bandwidth utilization, a highperformance dualport network is introduced in this paper. Each router in the structure provides two local ports, and each resource node connects with two routers in a diagonal. A destination node switching method is proposed in this structure to improve the parallel communication ability of network. Meanwhile, to further improve the performance of the network, the Torus structure is introduced to reduce the network radius. This paper builds a model of dualport network, and evaluates its performance. Compared with signalport network, the experiment results show that the structure can improve the average throughput and the average latency by 83.3% and 559% at best in unary affairs. Compared with the same dimension dualport network, the experiment results show that the structure can improve the average throughput and the average latency by 91.1% and 54.3% at best in binary affairs.