The invention belongs to the LED packaging field and discloses a white light LED and a manufacturing method. The white light LED comprises a substrate, an LED chip and a light transmission shell. TheLED chip is arranged on a substrate surface and is coated with a fluorescence colloid formed through mixing a colloid matrix, a fluorescent powder and a quantum dot composite material. The quantum dotcomposite material is formed by quantum dot particles and high heat conductivity coefficient material particles. The light transmission shell is arranged above the substrate. The LED chip and the fluorescence colloid are sealed inside and a packaging glue is filled between the light transmission shell and the fluorescence colloid. The method comprises the following steps of installing the LED chip on an upper surface of the substrate; dispensing the fluorescence colloid above the LED chip, heating and curing; nesting the light transmission shell above the LED chip and the fluorescence colloid; and filling the packaging glue in a gap between the fluorescence colloid and the light transmission shell and curing, and then acquiring the white light LED. In the invention, a work temperature ofthe white light LED can be effectively reduced, amounts of the fluorescent powder and quantum dots are decreased and cost is reduced.