The invention relates to a method for producing a reflective film with a microprism array structure. The invention overcomes the defects of poor hardness, scratch resistance, thermal resistance and solvent resistance of a microprism, poor product consistency, low production speed, low working efficiency and the like existing in the prior art. The invention adopts an endless belt-shaped mould of which a protruded continuous precise microprism array structure is arranged on the outer surface and comprises the following production steps that: a resin film is coated with photosensitive resin and then subjected to drying, heated film pressure and quickly solidification by UV light irradiation, so that the resin film coated with the photosensitive resin and the microprism structure on the photosensitive resin layer jointly form a laminated film, and the laminated film is cooled to obtain the reflective film with the microprism array structure. The method has the advantages of simple and convenient operation, high production speed and high working efficiency; and the formed microprism has the advantages of better hardness, scratch resistance, thermal resistance and solvent resistance, and good product consistency.