The invention discloses an alkali-resistant disperse dye complex, and relates to disperse blue BR-based alkali-resistant disperse dye complexes suitable for dyeing in a wide pH range. The complex comprises (1) alkali-resistant disperse dye blue complex, or (2) alkali-resistant disperse dye blue complex, or (3) alkali-resistant disperse dye black complex. The disperse dye complex of the invention has good dispersibility, dyeing stability and good reproducibility, and can effectively avoid the problems of stains, flaws, chromatic aberration and the like caused by dirt such as slurry, oil stain,wax and the like on fibers; and the pH value has wide range during use, dyeing can be performed in the pH range of 4.0 to 11.25, the dyed fabrics have full hue, and the dyed fabrics with predominant color fastness performance such as washing fatness, daylight fastness and the like can be obtained without reduction clearing.