The invention provides a disperse dye composition, a disperse dye as well as a preparation method and application of the disperse dye. The disperse dye has the beneficial effects that the disperse dye is very suitable for dyeing and printing of polyester and other blended fabrics, especially for printing; the disperse dye has the printing effects of blackness, glossiness, clear outline, few stains on white backgrounds and good sublimation fastness, so that the disperse dye is a rare medium or dark printing disperse dye.