The invention discloses a coating method of an organic/inorganic nano composite high-molecular film for glass, belonging to the technical field of high-molecular energy-saving coating. The method comprises the following steps: preparing dispersions; stirring the dispersions, carrying out on-line ultrasonic dispersion and circulation flow; sending the dispersions into a storage tank from a stirring pot, sending the dispersions in a coating pan through a dispersion distributor and a closed pipeline provided with a metering system, wherein the dispersion distributor is arranged in the coating pan; coating the dispersions onto a high transparency polyester film by using a scraper capable of moving along a direction which forms an angle of 60 degrees with the horizontal direction and a coating roll for transmitting a high transparency polyester film base material, heating up for solidification to obtain the nano composite high-molecular film, wherein after the dispersions are uniformly stirred in the stirring pot, the dispersions are always in the closed pipeline until the dispersions are coated in the coating pan. The method has the advantage of low production cost, prevents agglomeration caused by long time storage of the nano particles, and prevents the dispersions from becoming sticky and absorbing moisture caused by solvent volatilization before coating, and the method is suitable for continuous industrial production.