Aiming at the problems that the thrust range of medium and high power electric thrusters for satellites is large and the existing thrust measurement devices have incomplete measurement range and poor anti-interference ability, the research of multi-range three-filament torsional pendulum thrust measurement device has been carried out. The physical model of the thrust measurement device was established, the mathematical relationship between the thrust force and the deflection displacement was studied, and the design of the multi-range three-filament torsional pendulum thrust measurement device was realized. The measurement device was calibrated using standard weights and custom weights, and the measurement errors at each range were determined by calibration experiments. The uncertainty assessment of the device was carried out by considering the uncertainty influencing factors comprehensively and designing relevant experiments. The experimental results showed that the uncertainty of the multi-range three-filament torsional pendulum thrust measurement device was 0.030 mN (k=2) for a small thrust of 98 mN, 0.068 mN (k=2) for a medium thrust of 490 mN, and 0.092 mN (k=2) for a large thrust of 980 mN in the same experimental environment. The multi-range torsional pendulum thrust measurement device uses the measurement method of changing gears to achieve thrust measurement in the range of 9.8~1029 mN with high measurement accuracy and strong anti-interference capability, which solves the problem that it is difficult to guarantee the full range accuracyin the process of wide range thrust measurement, and provides technical support for the thrust measurement of medium and high power electric thrusters.