Abstract: Under operational conditions, rotating parts in satellites under multiple loads exhibit a multi-polarized magnetic state, generating dynamic magnetic fields. The superposition of these fields results in periodic fluctuations in the magnetic moments of the satellite’s entire structure. The amplitude of these fluctuations depends on factors such as the number, rotational frequency, intrinsic magnetic moment, and operating current of each rotating part. Through analysis of dynamic field data from a remote sensing satellite, and testing and analysis of the magnetic fields and moments of the entire satellite and its main rotating parts, the variation patterns and characteristics of the fields generated by individual parts were identified. This reveals the reasons behind the fluctuations in magnetic moment. These findings offer insights for the magnetic design and control of remote sensing satellites with multiple rotating parts.