A microcosmic experiment was set to investigate effects of controlling measures like adding carbon sources，plowing and mulching，on bioremediation of polychlorinated biphenyls (PCBs) polluted soils and changes in soil microbial ecology. Results showed that soil stirring was the most effective method，being 29.3% in depletion rate，and adding starch and mulching with plastic film came the next，similar in effect to each other，PCBs degradation was significantly enhanced in all these treatments. Compared to the control，the treatments of addition of starch and cultivation of soil showed much higher density of soil microbiology，but lower-utilization ability of communities for carbon(AWCD) and lower functional diversity. In the treatment of mulching，the density of soil microbiology，the utilization ability of communities for carbon and the functional diversity all decreased. The results indicate that the controlling measures could not only influence the depletion rate of PCBs，but also alter the structure and affect activity and function of the soil microorganism.