Depth-controllable electrolytic layer stripping method

The invention discloses a depth-controllable electrolytic layer stripping method. The depth-controllable electrolytic layer stripping method comprises the following steps that an electrolytic tank with an opening at the lower end is fixed above a to-be-stripped area of a metal workpiece, and a cathode sheet with a metal sheet structure is fixed in the middle of a cavity of the electrolytic tank; an electrolyte is circularly input into the inner cavity of the electrolysis tank, so that the space between the position below the cathode sheet in the inner cavity of the electrolysis tank and the metal workpiece is always filled with the electrolyte; a detection head of an ultrasonic detector is installed on the cathode sheet, and the cathode sheet and the metal workpiece are connected with the negative electrode and the positive electrode of a direct-current power source through wires respectively; the distance between the lower surface of the cathode sheet and the metal workpiece is measured in real time through