The invention relates to a diaper sensor and a manufacture method therefor. The sensor comprises a detection electrode and a hydrophilic first substrate. The detection electrode comprises a first metal strip belt which is arranged on a first surface of the first substrate and in the shape of a straight line, and a second metal strip belt and a third metal strip belt which are located on the two sides of the first metal strip belt and are parallel to the first metal strip belt. The first, second, and third metal strip belts are correspondingly provided with first, second and third conductive connecting parts. The middle portion of the second metal strip belt or the third metal strip belt is provided with a first through hole dividing the metal strip belt into two sections.
