The dosage of TiO2 and its surface-loaded silver had notable effect on the photocatalytic degradation of Aroclor1260, under ultraviolet light. The dosage of TiO2 had no proportion to the degradation rate of Aroclor1260, but had an optimal value, which was 3 g/L under the experimental condition. The degradation rate of Aroclor1260 increased with the increasing of loading silver, and the PCBs congeners with higher concentration had higher degradation rate. The catalytic activity of TiO2 increased with the amount of loading silver increasing.