Chloroethene is carcinogenic which is extremely harmful to the human. Currently, the effect of bioremediation of chloroethene is efficientit is also friendly to the environment. However, dichloroethenevinyl chloride are the most products that will be accumulated in the environment after dechlorination. Our team isolate the first native Dehalococcoides in Taiwanalso develop a novel dechlorination bio-gel bioremediation technology with silica bio-gel column. Our immobilized system is ａ novel an efficient method to remediate chloroethene into ethene, a non-toxic compound.