Abstract: Various kinds of sizing liquid including pure starch,pure PVA and their mixture were treated respectively by high speed shear homogenization method for the purpose of investigating the change of their size film behaviors after treatment.The experimental results indicate that homogenization can improve the property of pure starch size film,and enhance the breaking strength,the breaking elongation and flex rate of mixture size film.The shear time and speed are in proportion with the improvement degree of the size films with the scope of research.