The invention discloses a high-permeability diversion layer material and a preparation method thereof, and relates to the field of disposable sanitary products. The preparation method of the high-permeability diversion layer material is characterized in that by compound-superimposing and selecting an upper layer vertical net and a bottom layer direct laying net, matching coarse denier profiled cross-section fibers and fine denier hydrophilic double components in the upper layer vertical net, reasonably matching hydrophilic and water-repellent double-component fiber in the bottom layer direct laying net, selecting a hot air penetration thermal stabilization mode and reasonably selecting lustring and setting technological parameters of a hot pressing roll, the high-permeability diversion layer material with good permeability is prepared. Therefore, the technical problems of poor diversion performance, inability in storing liquid, poor transient sucking effect, complex technology, poor permeability and difficulty in quantity production of a diversion layer material are solved, and the effects of enabling the diversion layer material to have good abilities of transient suction property, diversion property, barrier property and temporary liquid storage and to have good effects of ventilation, moisture permeation and reverse osmosis prevention are achieved.