Abstract: The efficiency of a spaceborne magnetometer is affected by various kinds of interference on the satellite platform. A high-precision detector for the space magnetic field detection is used to evaluate the magnetic disturbance, produced by some drive mechanisms of ground simulated devices in a complex background environment. Magnetic field measurement data are processed by using the wavelet analysis method. With a multi-probe configuration, the calibration on orbit and the data processing method, the space magnetic field detector can effectively remove the static remanence of the platform and the dynamic magnetic disturbance.