The invention belongs to the technical field of oil production pipe bridge plugs, and discloses a hydraulic type small-diameter oil pipe setting bridge plug. The hydraulic type small-diameter oil pipesetting bridge plug comprises a combined rubber cylinder, a central tube, a lower cone, two slip rings, a slip seat, an anchoring cast iron and a steel wire loop. The central tube sleeves the interior of the combined rubber cylinder, the lower cone is arranged at one end of the combined rubber cylinder, and the lower cone is movably connected with the central tube in a sleeving mode. A shearing plate is arranged between the two slip rings, so that while the lower cone descends for opening of the slip rings, the shearing plate is opened by the lower cone, and the thin-walled end of the shearing plate jacks up the steel wire loop to provide a shearing point of the steel wire loop based on the fulcrum position of the shearing plate, so that in the process of opening the slip rings, originaltensile strength fracture overcoming of the steel wire loop is transformed to shear strength fracture overcoming of the steel wire loop; and under the same descending distance of the lower cone, according to the hydraulic type small-diameter oil pipe setting bridge plug, the steel wire loop is more prone to being fractured, so that the slip rings have smaller potential energy reserve when the steel wire loop is fractured, and furthermore, the anchoring cast iron is more moderately pressed against the inner wall of a wellbore.