Abstract: This invention relates to a secondary optics for the multi-chip LED. It features in that the optics consists of a refraction collimating portion, two total internal reflection (TIR) portions, an emitting surface with a micro lens array, an edge flange and a snap lug for lens assembly. The refraction collimating portion is located on the centre of the lens bottom, which has a convex aspheric surface. Around the refraction collimating portion outwards, there are two rounds of TIR prisms, featured in that at least one TIR prism has a flake polyhedral reflection surface. On top of the secondary optics, there is the emitting surface constituted with the micro lens array. The edge flange and the snap lug for lens positioning represent non operational portion and may have any shape. Related to the present invention, the LED used therewith may be a multi-chip or single-chip LED.