Effects of soil pH on soil cadmium formations and nutrients and Cd concentration of each part in rice were studied by pot experiments. Results showed Cd bioavailability and concentration of each part in rice were affected by soil pH. Fe content in rice root iron plaque was also great affected by soil pH, but less effects on the contents of soil total N, total P, total K and organic matter was detected. At soil pH 4–9, extremely remarkable linear correlations (P<0.01) were found between the percentages of exchangeable Cd, reducible Cd, residual Cd and soil pH, which were also found between Cd concentration in rice root, stem, leaves and soil pH. Significant linear correlations (P<0.05) were found between soil pH and the Cd content in rice grain, but there were no significant correlations between soil pH and the contents of soil total N, total P, total K and organic matter. Although rice Cd pollution can be prevented and controlled with alkaline modifying agents by soil pH increase, the addition amount must be considered, which have significant effects on remediation of Cd contaminated rice. What`s more, the adaptability of different rice varieties and effects of acidic precipitation must be also considered. Based on the regression equation acquired in this study, the inferred optimum soil pH for rice Cd Pollution Control was 6.49 to 7.34.