A combined low-pass filtering technology for space Fiber Optic Gyroscope (FOG) is proposedwhich is easy to implement in FPGA.When the momentum wheeli.e.the actuator of satelliterotates at high speedit will cause low-amplitudehigh-frequency vibration of the satellitewhich is harmful to the satellite.If the bandwidth of FOG is too highthe high-frequency vibration will lead to greater noiseand even mixed output of FOGwhich will result in degraded control quality of the satellite.In consideration of both cost and effect of the filterwe propose a design scheme of FIR + IIR combined filter.The scheme uses five hundred and sixteen logic unitswhich only accounts for 13.8% of the chip resources of A54SX72A.It can be added to the FPGA program of FOG closed digital loop.The advantage is that it is easy to realize high-speed filtering and improve the effect of filtering out the high-frequency interference signals.In this waythe users dont have to design filters separately in other terminals.The configuration cost of the whole satellite control system is reducedand the application configuration of space FOG is simplified.