Abstract: The interfaces of Attitude and Orbit Control System (AOCS) were analyzed during the process of some satellite desktop electric integration tests.A design method of general-purpose electric simulator based on SOC (System-On-a-Chip) was proposed to solve the complex interfaces and multi-type signals.The satellite general-purpose electric simulator was designed and how to adapt it to configure the gyro electric simulator,wheel electric simulator was presented and a general control module was illustrated.According to the requirements of the AOCS desktop electric integration testing system,On-Board-Computer simulator,general interfaces box,sensor simulator and actuator simulator were configured.The simulators,communicating with other parts by CAN (Controller Area Network) bus,were used in the desktop electric integration testing system to simulate sun capture,earth capture and normal control modes.The results show that the general-purpose electric simulator meets the requirements and has reference value to the development of other electric simulators of satellite desktop electric integration testing system.