Azoxy dyes and their copper complexes with maximum dichroism in the spectrum range from 550 nm to 700 nm were synthesized and used to prepare polyvinyl alcohol (PVA) polarizing films.These films showed excellent polarizing ability.In addition, a neutral gray polarizing film was prepared by mixing synthesized dichromatic dyes with other dyes.The obtained polarizable film for gray shade was little pervious to light over the visible radiation wavelength region, ranging from 400 nm to 700 nm at cross state, and excellent in the polarizing activities and stable to moisture and heat.