The invention relates to an LED with red, green and blue chips and a backlight module. The LED with the red, green and blue chips comprises the red chip, a first support, the green chip, a second support, the blue chip and a third support, wherein the first support is used for fixing the red chip; the material of the first support has a first heat resistance value; the second support is used for fixing the green chip; the material of the second support has a second heat resistance value; the third support is used for fixing the blue chip; the material of the third support has a third heat resistance value; the first heat resistance value is minimum; the second heat resistance value is medium; and the third heat resistance value is maximum. Color points can be controlled conveniently, and a high color gamut of the backlight module can be realized at low cost.