Coloring agent, colored ABS resin and preparation method and application thereof

The invention discloses a coloring agent, colored ABS (Acrylonitrile Butadiene Styrene) resin as well as a preparation method and application thereof, and belongs to the technical field of colored resin. The coloring agent comprises the following components in parts by weight: 1-2 parts of a light stabilizer, 0.05-0.5 part of a diketopyrrolopyrrole series pigment and 0.05-0.5 part of a metal complex pigment, the average particle size of the diketopyrrolopyrrole series pigment is 8-25 [mu] m, and the average particle size of the metal complex pigment is 8-20 [mu] m. The resin colorant provided by the invention contains the diketopyrrolopyrrole pigment, the metal complex pigment and the light stabilizer, the weather resistance of the organic pigment is remarkably improved by utilizing the light stabilizer, and the colorant with good heat resistance, light resistance and weather resistance is obtained by compounding; when the modified ABS resin is applied to ABS resin, the problem that ABS colored resin is poor