The invention discloses an automatic flow-regulating type water dropper comprising a water inlet body, an energy dissipation body, a control body and a negative pressure body, wherein the water inlet body comprises a base body, a cavity a and a cavity b are arranged in the base body vertically, the top of the base body is provided with a water inlet, the side surface of the base body is provided with a water outlet, the bottom of the energy dissipation body is provided with a disk, a column is perpendicular to the center of the disk, the side of the column is provided with a small overflowinghole, a cavity c is arranged in the column, and the top end of the column is provided with an energy dissipation channel; the control body comprises a baffle plate which is provided with a cavity d, a cavity e which is separated by a rubber diaphragm is arranged under the cavity d, the rubber diaphragm is connected with one end of a straight rod by a pull wire, the other end of the straight rod is fixed on the baffle plate, and the upper surface of the straight rod is provided with a rubber plug; the negative pressure body comprises an organic glass pipe, a cavity f is arranged in the organicglass pipe, one side of the organic glass pipe is provided with a water injection hole, and the lower end of the organic glass pipe is sleeved with an argil head. The automatic flow-regulating type water dropper has good water saving effect and high automation degree.