The invention discloses an anti-interference high-sensitivity gas-liquid two-phase flow phase content detection method, and belongs to the field of multi-phase flow detection. The method has the technical scheme key point that sensitivity is low and anti-interference capability is poor since the conductivity and the magnetic conductivity of two-phase flow are low. On the basis of an electromagnetic resonance principle, when an emission system and a receiving system are both under a resonance state, the measurement of the two-phase flow phase content is more sensitive than traditional electromagnetic detection. In addition, since an emission circuit and a receiving circuit are resonant at the same frequency, electromagnetic wave interference is small. On the above basis, the two-phase flowis subjected to mathematical model establishment, and a complex two-phase flow problem is converted into simple mathematical calculation.