An activated carbon for refinement of injection was prepared from hydrolysis lignin by a chemical method(ZnCl2 as activator).The effects of the ligninliquid ratio,activation temperature and time on the yield,quinine sulfate adsorption and methylene blue adsorption of the activated carbon were researched.The suitable technological conditions were determined: activation temperature 550 ℃,activation time 2 h,ligninliquid ratio 1∶3.5,ZnCl2 concentration 46°Be′(60 ℃).The yield of activated carbon produced on the above conditions was 50.28%.The properties of the obtained activated carbon were investigated.The results are quinine sulfate adsorption≥120 mg/g,methylene blue adsorption 180 mg/g ,pH 6.5,Fe 0.01%,Cl- 0.05%,SO2-4 0.05%,ash 2.63%,acidsoluble substance 0.6%,zine salt 0.003%,and sulfide,heavy metals,cyanide,uncarbonized constituent are all qualified.