With the improvement of people's living standards and social economy, the demand for the liquid crystal display with excellent color rendering and color reproduction has increased dramatically. However, the commercial use of the traditional rare-earth doped phosphor color converters can no longer meet the needs of wide color gamut display due to the wide emission full width at half maximum. Therefore, it is urgent to develop a new material to realize a wide color gamut display. Perovskite quantum dot glass is considered an ideal replacement for traditional phosphor transitions in backlit displays due to its excellent optical properties and superior stability, and has a wide range of applications in the display industry. This paper provides an overview of how perovskite quantum dot glass backlight structures can be applied and gives an overview of the current state of research and the challenges faced in developing perovskite quantum dot glass for backlight applications in recent years, and finally gives an outlook on it.