There is a problem of blind reclosing to permanent interphase faults in distribution networks. Thus a method for identifying the permanent faults before the interphase reclosing is proposed. This is based on the characteristics of multiple disturbance current waveforms. After the three-phase tripping of the distribution line with an interphase fault, a high-frequency voltage excitation is applied to the three interphase circuits successively. In the case of a permanent fault, both the fault and non-fault interphase circuits contain a transition resistance branch. However, when there is no fault after the transient fault is extinguished, the interphase circuits are not affected by the transition resistance branch. Additionally, the waveforms of the disturbance currents in the different circuits mentioned above are distinct, and the waveform difference is used to detect the condition of the interphase circuits. Then the Hausdorff distance coefficient H is used to characterize the difference of disturbance current waveforms, and if the waveforms of multiple disturbance currents are highly consistent during the judgment period, that is, the H value is close to 0, then it is judged as a permanent interphase fault. A permanent fault identification criterion using the Hausdorff distance coefficient and a corresponding implementation scheme are constructed. The simulation results of PSCAD/EMTDC and experiments show that the method can effectively identify permanent faults, and is independent of transition resistance and fault location.