The experiment was about the range of pH and the difference micro- community in rhizosphere under soybean continuous cropping system soil. The data of pH in rhizosphere indicated that the resistant cultivars could keep the pH higher than 7.0 in whole life which pH range was not benefit for root rot pathogen growth such as Fusarium oxysporum. On the country, the pH in rhizosphere of HF25 was always lower than 7.0 which benefit for pathogen growth. The microbial in rhizosphere among soybean cultivars were different in continuous cropping soybean soil. The data showed that the number of bacteria in rhizosphere of resistant cultivars such as SNIO and KX2 was increased with the plant growth, and the fungi was decreased. But for HF25, the bacteria in rhizosphere was no significant change with the plant growth neither the fungi.