The invention relates to absorbent paper as well as a preparation method and application thereof. The method comprises the following steps: pulping
plant fiber pulp, adding
sodium bicarbonate for pretreatment, and washing to obtain pretreated paper pulp; adding a dispersing agent, a
wet strength agent and a composite antibacterial component into the pretreated paper pulp, and uniformly mixing to obtain mixed paper pulp; the composite antibacterial component is prepared from
chitosan,
polylysine and a modified
copper oxide dispersion liquid; feeding the mixed paper pulp into a rotary screen
paper machine to produce upper-layer single-layer wrinkling base paper, then compounding the upper-layer single-layer wrinkling base paper with lower-layer single-layer semi-forming base paper on which the macromolecular water-absorbent resin particles are scattered, and then
drying to obtain the water-absorbent paper. The antibacterial rate of the absorbent paper on various
pathogenic bacteria is larger than or equal to 99.5%, the antibacterial rate is still larger than or equal to 97% after 20 times of
water washing, and the absorbent paper is high in water absorption speed, stable in
physical performance, safe,
environmentally friendly, controllable in cost, capable of being widely applied to the fields of hygienic products, medical dressings,
food packaging and the like, simple in preparation process and suitable for industrial production.