In recent years, the harm of blue light to human eyes has gradually been recognized and concerned by people. Blue light hazard exists not only in illumination sources, but also in display products. Reducing the blue light content is a direct way to reduce the hazard of blue light. However, blue light is an indispensable component band in the spectrum of display products. It is a necessary color to meet the needs of color temperature and gamut of display products, as well as to display the real color of the world. Therefore, the anti-blue light hazard technology of display products without lowering the normal display standard has been an important research direction in the display field. At present, many researchers at home and abroad have conducted many research on blue light hazard and anti-blue light display technology. In this paper, the mechanism, classification and evaluation methods and standards of blue light hazard were explained. And then the influencing factors of blue light hazard in the display products were analyzed. Moreover, the new progress of anti-blue light display technology was introduced and summarized.