The invention relates to a deep-color disperse dye composition. In order to solve the problems that the molecular attraction between a dye and an ultrafine denier fiber is greatly reduced, the dyeing rate of the dye is greatly reduced, the fastnesses on all the aspects of a dyed fabric are reduced to different extents, and particularly, the influence on the washing fastness is most remarkable because the dyeing performance of a common deep-color disperse dye is not good, the invention provides the deep-color disperse dye composition which contains the following components in parts by weight: 5-95 parts of one or more dye components A as shown in the formula (I) and 5-95 parts of one or more dye components B as shown in the formula (II). The invention provides the economic disperse dye composition which has good washing fastness on a polyester fiber and polyester blended fabric.