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In view of the stability of the momentum wheel in the low orbit remote sensing satellite, the fault tolerant control of the low orbit remote sensing satellite with momentum wheel as the actuator is studied. A fault tolerant control method combining Calman filter and fuzzy PID control rate is proposed. First, the momentum wheel fault model of the low orbit remote sensing satellite is established, and the Calman filter algorithm is used to filter the noise. Then, the fuzzy PID fault tolerant controller is designed according to the results of Calman filter. The simulation comparison experiment with the traditional PID fault tolerant controller is carried out, and the method is verified in the closed loop attitude control system fault tolerant control field. Strong adaptability and strong robustness.