The invention discloses a light leakage preventing structure applied in cooperation with a quantum dot high-color-gamut optical film. The structure comprises a backlight source, and the surface of at least one module of the backlight source is provided with a color coating which contains a light absorption material and/or a fluorescent material. The light absorption material absorbs excessive blue light on the periphery of the edge of a blue-light LED backlight source, and the fluorescent material absorbs blue light and then converts the excessive blue light into white light. The blue light leakage defect of liquid crystal display equipment with the quantum dot high-color-gamut optical film and the blue light LED backlight source is effectively overcome.