The invention discloses a cotton packing roll film. The cotton packing roll film comprises a roll film base material composed of a plurality of packaging sections, wherein each packaging section comprises an adhesive area and a non-adhesive area, the adhesive area of the previous packaging section is connected to one end, as a folded end in Z-shaped, of the non-adhesive area of the latter packaging section, a separable bonding structure is arranged between the two end faces, close to the concave position of the middle of the adhesive area, of the folding end, and a tearing line is arranged atthe interface part of the adhesive area of the previous packaging section and the non-adhesive area of the latter packaging section. The cotton packing roll film has the following advantages and effects that the separable layer is peeled from an adhesive layer at the end of one packaging section cycle, and the adhesive layer is used for adhering to the next adhesive area for sealing when the cycleof the packaging section is finished, the packaged cotton can cause the tearing line to crack due to the pulling force generated by the rotation inertia, the pulling force in the tearing line splitting process can enable the adhesive layer to adhere more firmly to the next adhesive area, and meanwhile, the demand of the adhesive agent can be reduced by adopting the tearing line, and the environmental protection property is improved.