In order to improve the color deviation of the SUVA3，by which the left and right visual role bias （CR_（80/20）） was worse than that of UV²A process，the combined energy exposure （PBS + WGP mode） ， ITO Slit angle and WGP angle were studied from the process，design and other aspects. The experimental results showed that the ITO slit +WGP mode had better effect，as far as the color deviation &mass production were concerned，and the color deviation of SUVA3 could be optimized to the level of UV²A.