The invention discloses a method for calibrating phase consistency between underwater acoustic array channels based on a motion sound source, relates to an external field calibration method for phaseconsistency between underwater acoustic array channels, and belongs to the field of parameter estimation. The problem that when the phase between the underwater array channels is calibrated under theexternal field condition, the phase calibration precision between the array channels is poor due to the fact that the position of the sound source is inaccurate is solved. According to the method, a single motion sound source is utilized; broadband signal, azimuth information of the test ship is obtained by utilizing real-time position coordinates of the test ship and real-time position coordinates of the underwater acoustic array, so that the real phase difference between the underwater array channels is obtained as reference, the phase difference deviation value between the channels is obtained, and signals received by the detection channels are calibrated. The method is mainly used for calibrating the phase between the underwater acoustic array channels.