Abstract: The quartz-flexibility-accelerometer of high precision can be used to measure the low frequency micro-vibration of spacecraft on-orbit directly, and the micro-angle vibration indirectly. The paper makes an uncertainty analysis when the quartz-flexibility-accelerometer is applied to measure the micro-vibration acceleration, the angular acceleration, the angular velocity and the angular displacement, the calculation method is proposed and various influencing factors are analyzed for the combined measurement uncertainty based on the measurement principle. An eight accelerometer measurement point layout is designed for the entire satellite test in the rigid planar test environment for the satellite sensitive payload. Entire satellite measured data show that the quartz-flexibility-accelerometer can accurately measure spacecraft's low frequency micro-vibration, the direct and indirect measurement results meet the need of applications, the linear acceleration measurement resolution ratio is 5μg, and the angular displacement measurement resolution ratio is 0.015".