The invention belongs to an error elimination method, particularly relates to a dual-core spin magnetic frequency shift suppression method. The dual-core spin magnetic frequency shift suppression method comprises the steps that firstly, heating is conducted, specifically, an atomic chamber is heated to at least 120 DEG C in a non-magetic heating assembly, secondly, polarization is conducted, thirdly, resonance is conducted, fourth, inspecting is conducted, specifically, inspected laser enters the atomic chamber through polarizer, and resonant frequency is inspected; fifth, an electron spin polarization direction is overturned; and sixth, calculating is conducted. The dual-core spin magnetic frequency shift suppression method has the beneficial effects that on the basis of active magnetic compensation of an atomic magnetometer, dual-core spin magnetic frequency shift error drifting is compressed, and thus zero-bias stability of a gyroscope is improved.