The invention relates to a preparation method of temperature responsiveness thin polymer film, in particular to a preparation method of wetting quality thin polymer switch film based on polymer transformation temperature responsiveness. The preparation method utilizes the principle that the changes of molecular aggregates state before and after the phase transition of polymer molecule can cause the changes of macroscopical physical appearance, and can ensure that the surface of the material is possessed with wetting quality temperature responsiveness with reversible change by simple surface printing on smooth surface or rough surface with micrometer structure or nano-structure. The molecule selected is provided with hydrophilic group and hydrophobic group simultaneously and the polymer with 20 to 100 degrees C transformation point dissolves in organic solvent before printing on the surface of smooth or roughened solid base. The surface wetting quality of the thin polymer switch film can vary with the environment temperature, wherein, the material surface is hydrophobic when the temperature is lower than the transformation temperature of the polymer, or else the material surface ishydrophilic. The roughness of the base surface amplifies the changes of the wetting quality.