Abstract: Based on the theoretic analysis of disperse dyeing of polyester fiber, by structure design and components optimization, the environment-friendly aromatic ester ALE-F, which showed excellent accelerating effect for low temperature dyeing and could be used as the main component in the novel accelerator, was developed, and a novel accelerator, the low temperature dyeing accelerator BLB was prepared by high internal phase emulsifying method using 6% specific emulsifier DT-1 consisting of non-ionic surfactants 600-#3, EL-10 and anionic surfactant AES. The dyeing tests indicated that, adding 2% BLB(o.w.f) in the dyeing bath with dye concentration of 1% (o.w.f.), the dye uptake of all three types (high, middle and low temperature suitable) of disperse dyes can exceed 95% at 105℃.