Ultrafine disperse dye/latex complex colorants dispersion was prepared through miniemulsion polymerization with polymerizable emulsifier (DNS-86). The influences of co-emulsifier, emulsifier, and ultrasound processing time on properties of complex colorants dispersion were investigated. The results show that hexadecane(HD) was more effective than cetyl alcohol(CA) and dodecanethiol（DDM）; The stability of ultrafine disperse dye/latex complex colorants dispersion prepared with DNS-86 was obviously superior to that with conventional emulsifier; When the concentration of DNS-86 was 14.4 mmol?L-1, the weight ratio of cetyl alcohol to monomer was 7.5%, ultrasound processing time was 15min, the ultrafine disperse dye/latex complex colorants dispersion prepared had a diameter of 123nm and Npf/Nmi value of 1.23 ,which indicated that the polymerization was mainly taking place in droplet nucleation.