The invention provides a separating type monitoring circuit of an alternating/direct current aliasing magnetic field. The separating type monitoring circuit comprises a power supply (4), a Hall probe (1), an instrumentation amplifier (2) and an alternating/direct current signal separating module (3), wherein the power supply (4), the Hall probe (1), the instrument-used amplifier (2) and the alternating/direct current signal separating module (3) are sequentially connected. The separating type monitoring circuit is simple in structure, low in cost and capable of monitoring the environment of the alternating/direct current aliasing magnetic field and obtaining component values of a direct current magnetic field and an alternating current magnetic field, and thus the separating type monitoring of the alternating/direct current aliasing magnetic field is completed.