An indium phthalocyanine dye dopped PMMA and PC thin film were obtained by a optical glass modul, which maybe used as a laser protective dye. The absorption spectra of chloroform solution, PMMA and PC films were studied. It was revealed that indium phthalocyanine monomer existed in the tested concentrations, there was an intense and sharp absorption at 694nm, which suited for laser protection. At the same time, the spectra were explained with its energy levels structure. In films, two strong and shouder absorption bands were observed in Q band, which were slightly hypsochromically or hypochromically shifted and wider compared with the solution absorption spectra. In order to obtain the same absorbance the dyes needed changed greatly. These phenomena can be explained that there were photofading in solutions and molecular aggregation in polymers. At the same time, based on the resulting fragments by EI MS, the mechanism of the photofading was proposed.