The invention relates to a half-wrapped ultrathin liquid-absorption core body and a making method. The half-wrapped ultrathin liquid-absorption core body can enable macromolecule resin to be distributed among swelling non-woven fabric grains and enable the liquid-absorption property of the macromolecule resin to be completely exerted and can effectively decrease the thickness of an absorber itself on the premise that a fluff pulp carrier is not needed for positioning the macromolecule resin, and an adhesive is not needed for positioning the macromolecule resin. The half-wrapped ultrathin liquid-absorption core body comprises a wrapping layer, a liquid-absorption layer is located on the wrapping layer, a covering layer is located on the liquid-absorption layer, a diversion layer is located on the covering layer, and the edges of the wrapping layer are taken up on the edges of the diversion layer. The half-wrapped ultrathin liquid-absorption core body and the making method have the advantages that a fluff pulp does not need to serve as a fixation base material of the macromolecule resin, the thickness of the absorber is greatly decreased, and the problem that distribution of the macromolecule resin on the fluff pulp is uneven is solved; due to the fact that the adhesive is not needed for fixing the macromolecule resin, the absorbing capacity of the macromolecule resin is fully utilized; the manufacturing cost is greatly reduced, and the production efficiency is greatly improved.