Abstract: PCI Express (PCIE) bus has been widely used in the computer platform because of the high bandwidth, the point-to-point interconnect architecture, highly compatible to PCI bus and so on. When more than two processor systems are connected by PCIE bridge, PCIE non-transparent bridge (NTB) effectively isolates the PCIE bus domain of both ends of the bridge, preventing conflict when addressing. In the paper, PCIE switch connects the CPU and double GPU by way of a non-transparent bridge to build the embedded heterogeneous computing platform of high-performance. In the design of software layers, the PCIE bus driver and PCIE Switch driver design is completed based on the Linux operation system.At last, the paper achieves a high-speed communication between a plurality of Root.