The invention discloses a preparation method of an absorbable anti-infection hernia repair sheet, which comprises a polypropylene base sheet, and a composite film composed of a degradable polymer material and a chitosan solution is arranged on the outside of the polypropylene base sheet. The patch is distributed by dissolving the degradable polymer material in the polymer material solvent, dissolving chitosan in the organic acid, mixing the two solutions, pouring them on a flat plate, and evaporating to form a thin film; Brush rice bran glue, stick the side coated with rice bran glue to one side of the polypropylene base sheet, and get the fibrous membrane hernia repair sheet. In the present invention, the polypropylene substrate has a single-layer network structure, is easily infiltrated by connective tissue, has little foreign body reaction, and has good tensile strength. Polylactic acid can have good degradation performance, chitosan has good moldability and biocompatibility, and can promote wound healing. Rice bran gum is also a biodegradable binder. The invention can prevent the viscera from sticking to the patch, reduce the probability of complications, and has good practical value.