The invention discloses a distributed generation-containing distribution network single-phase break line fault line selection method. The method comprises steps: a symmetrical component method is used for calculating the negative sequence current of each feeder line; EMD decomposition is carried out on the negative sequence current of each feeder line to obtain an each-order intrinsic mode component IMF; Hilbert transform is carried out on the each-order intrinsic mode component IMF respectively to obtain a corresponding instantaneous amplitude waveform; with the fault happening time as reference, the sum of instantaneous amplitudes of each m frequencies after set periods before and after the fault of the intrinsic mode component IMF with the set order of each feeder line and the change amount of the sum of instantaneous amplitudes are calculated respectively; and according to the change amount, a break line fault line is judged. Through analyzing and considering change features of each electrical quantity at the protection mounting place after single-phase break line fault happens to the distributed generation-containing distribution line, a break line protection criterion is put forward, the characteristic quantity after the fault happens is amplified, and the purpose of reliable fault detection is achieved.