The paper used anaerobic baffled reactors (ABRs) to treat rural domestic sewage，and chose the suitable packing.Flexible three-dimensional packing,the pall ring packing and fiber ball packing was chosen as ABR packing, and used an ABR without packing as a contrastive reactor,and investigated influence of packing on the treatment and biofacies of ABR and, and also analyzed the construction cost of these ABRs.The results showed that after filling the flexible three-dimensional packing, pall ring packing and fiber ball packing, the removal rates of ABR to COD,SCOD and SS have certain increase. There were more microbial species and quantities in the three ABRs filled with packing than that without packing.The construction cost of the ABR filled with flexible three-dimensional packing is almost 1/8 of the ABR filled with pall ring packing,and 1/15 of the ABR filled with fiber ball packing. Therefore the flexible three-dimensional packing was the most suitable one to be added into ABR to treat rural domestic sewage.When the equipment is stable, the average concentrations of effluent COD, SCOD and SS are 87.42 mg/L, 49.61 mg/L and 13.20 mg/L respectively, and the average removal rates of COD, SCOD and SS are 59.04 %, 60.05 % and 84.12 % respectively.