In this paper, Pd/C catalyst was used for hydrotreating chloride solution of acetic acid. According to the experiments, the optimal catalytic hydrogenation reaction conditions were determined: the reaction temperature was 170℃, the residence time was 216 minutes, the pressure was 0.27MPa (gauge pressure), the hydrogen flow was 105mL/min and the nitrogen flow was 7mL/min. Under these conditions, dichloroacetic acid content can be reduced to less than 0.2 percent by weight. Compared with the traditional treatment process of chloride solution, catalytic hydrogenation process was the green technology and it also reduced pollution caused by post-processing mother liquid of MCA. Consequently, the hydrogenation treatment of acetic acid chloride solution was more superior to the traditional process.