In this study, preparation of thermochromic material and then made into films, thermochromic materials of copper-pair of two-ethyl ammonium tetrachloro add film made of polyvinyl acetate, after drying, using spectrometer measurements of temperature in general temperature and high temperature light transmission rate and under the L* a* b* value changes.The experimental findings showed that the thermochromic film with increasing temperature, light transmission rate inversely proportional to the decline.