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In order to realize the ground semi physical simulation test of satellite attitude and orbit control, an electronic satellite simulator based on FPGA and PCIe bus is designed, and the image resolution supports 1024 * 1024; The image bit width supports 12bit. Based on the hardware structure of FPGA, the image processing card of electronic star simulator interacts with the upper computer interface software through PCIe bus, and uses LVDS (low voltage differential signaling) signal to transmit and receive star map data. The ground dynamics sends the quaternion to the electronic star simulator through Ethernet according to the 10ms cycle. The electronic star simulator transmits the generated electronic star map to the star sensor through LVDS. It is verified by the ground real-time simulation verification system that the error between the output of the electronic star model and the target value is less than 0.07%. The star sensitivity collects the accurate star map in the closed-loop test, which shows the feasibility of the electronic star simulator, It has good generalization in the ground semi physical simulation test of satellite attitude and orbit control.