The compounds of O-(thiaxanthon-2-yl)-oxyacetate,was synthesized from 2,2’-Dithiosalicylic acid.The compound was identified by elemental analysis,IR,1H NMR,13CNMR spectrum.The effect of ratio of starting materias,temperature,time on yield were explored,and the synthetic condition was optimized by high efficiency liquid chromatography.This method is more suitable for the industrial production.