The invention discloses a hydrodechlorination catalyst. The hydrodechlorination catalyst consists of main catalysts, an adjuvant and a carrier, wherein the main catalysts are Pd and Cu, the adjuvant is selected from one or a combination of two or three or more of Mg, Ca, Ba, Co, Mo, Ni, Sm and Ce, and the main catalysts and the adjuvant are loaded onto the activated carbon carrier. The hydrodechlorination catalyst provided by the invention is applicable to the preparation of chlorotrifluoroethylene from CFC-113 through catalytic hydrodechlorination and has the advantages of long service life, high chlorotrifluoroethylene selectivity and the like.