The invention discloses a liquid crystal display LED (light-emitting diode) backlight system with a night vision compatible function. A light source array comprises RGB (red green blue) LEDs and special light sources, the special light sources emit sensitive light components of a night-vision device, and a circuit respectively provides current for various LEDs to control the strength of emitted light. The liquid crystal display LED backlight system has the advantages of simple structure and production process, high light use ratio, chrominance adjustment flexibility, good compatible effect, low cost, less effect on color gamut and capability of ensuring clear seeing of information on a display screen with naked eyes and through the night-vision device.