Eighteen samples of paddy soils developed on red earth, alluvial and lacustrine deposits and Hsiasu loam (a heavily leached loess deposit) were collected from Kwantung, Kwansi, Kiangsi and Kiangsu provinces. They possess pH value from 5.4 to 8.0 and are of different fertility. Fractionations of soil mineral phosphate were conducted according to Chang and Jackson's scheme. Analytical results revealed that iron phosphate, most of which are coated with ferric oxide, predominate in paddy soils of acid and neutral reaction.