This study was thermochromic materials[(CH3CH2)2NH2]2[CuCl4], according to the weight percentage of fixed concentrations 0.2% adding polyvinyl alcohol (PVA) solution (8%) doped Fe/TiO_2 made of film, and then the film were at the room temperature and heated to 60℃ UV/Vis 200~800nm light absorption and light transmittance values were measured for analysis.The results obtained for the concentration and temperature increases, the [(CH_3CH_2)_2NH_2]_2[CuCl_4] doped Fe/TiO_2 absorption value of polyvinyl alcohol PVA films increased transmittance decreased, [(CH_3CH_2)_2NH_2]_2[CuCl_4] doped Fe/TiO_2 absorption of polyvinyl alcohol (PVA) films value of 200~400nm.