Abstract: Rapid integrated test，regular rapid inspection after batch storage and rapid inspection before launch have become urgent production problems for batch-produced spacecraft.The traditional spacecraft integrated test mode has the problems of low test efficiency，cumbersome test modification and deployment，high test cost，long test cycle and difficult in-depth product internal exploration，which cannot well meet the needs of rapid development and test of batch-produced spacecraft.In view of the above problems，starting from the design of spacecraft testability and self-test，the design method of spacecraft self-test function unit，self-test communication interaction mode and self-test diagnosis model based on structural model and behavior model is studied，and the construction of layered spacecraft self-test system is designed.The self-test process is quickly scheduled through bus，which improve the rapid maintenance capability to meet the needs of rapid inspection of batch-produced spacecraft.

Key words: On-board diagnostics, Built-in self-test, Self-test communication interface, Self-test function unit