Preparation method of thin antibacterial packaging paper

The invention relates to the technical field of papermaking, in particular to a preparation method of thin antibacterial packaging paper. The preparation method comprises the following steps: uniformly mixing 70 to 75 parts by mass of beaten bleached bagasse pulp, 0.5 to 1 part by mass of beaten bleached folium artemisiae argyi pulp, 18 to 22 parts by mass of beaten bleached leaf pulp, 4 to 6 parts by mass of cationic starch, 1 to 2 parts by mass of aluminum oxide, 0.1 to 0.2 part by mass of polydimethylsiloxane, 1 to 2 parts by mass of amino silane, 0.1 to 0.3 part by mass of carboxymethylcellulose, 0.5 to 1 part by mass of polyacrylamide, 0.1 to 0.2 part by mass of hydroxyethyl cellulose and 0.2 to 0.5 part by mass of polyurethane; the thin antibacterial packaging paper which is high in strength, good in softness and excellent in antibacterial performance is obtained by preparing a composite antibacterial liquid, preparing slurry, spraying the composite antibacterial liquid during wet paper forming, forming