Water delivery pipeline microleak detection method

The invention discloses a water delivery pipeline microleak detection method. The water delivery pipeline microleak detection method comprises the steps that the output end of a power source is connected to an ampere meter and connected to a ground probe through a general cable, and the ground probe is inserted into soil nearby a suspected leaking point or inserted into soil over a water pipeline;the other end of the power source is connected to one end a cable in a pipe, the other end of the cable in the pipe is connected to underwater detection equipment, and the underwater detection equipment advances along with water flow; currents sequentially pass through the ampere meter, the ground probe, the soil, the leaking point, the underwater detection equipment and the cable in the pipe from one electrode of the power source and then arrive at the other electrode of the power source to form a detection circuit; the power source is started after the underwater detection equipment is put,a current numerical value