Abstract: Taking aim at the shortage of PVA slurry and combining the characteristic of nanometer materials, added nanometer materials into the traditional starch and crylic acid slurry to improve the preperty of traditional slurry and to replace the PVA partially or completely. Changed the proportion of nanometer additive, metamorphic starch, PVA and crylic acid, designed three kinds of experiments and tested the film performance respectively.The result indicates that the nanometer additive can improve size film abrasion resistance, better serous adherence,diminish size film thickness,enhance serous viscosity and retain moisture absorption of size film.The mixed slurry that comprises nanometer additive but don't contain PVA could be acquired more ideal size film.