Cyanobacteria blooms and cyano-toxins such as the microcystins have brought much threat to the drinking water safety in most regions of China.So far there have been many technologies for removing blooming cells or cyano-toxins, while technologies for removing blooming cells and cyano-toxins simultaneously are still lacking.Thus, it is essential to develop technologies for removing blooming cells and cyano-toxins simultaneously.Through our previous work of removing microcystins by Fe(Ⅲ) compounds, we selected four soils for Fe(Ⅲ) modification and used them in removing microcystis cells and microcystin.The results indicated that clay content of soil correlated with the microcystin adsorption capacity.After modification by Fe(Ⅲ), the cation exchange capacity (CEC) of soil determined soils' adsorption capacity of microcystins.Moreover, removal ability of microcystins by soil was promoted significantly after Fe(Ⅲ) modification, especially for soil Ⅳ, about 148 times.In addition, Fe(Ⅲ) modified soil could also flocculate the Microcysits cells and flocculation efficiency correlated with the CEC of soil.The increase of Fe(Ⅲ) modified soil dose would shorten the equilibrium time of Microcystis cells flocculation.During application in the field, high removal efficiency of microcystis cells was also got as the results of laboratory experiment, but microcystins removal efficiency decreased due to competition reaction for Fe(Ⅲ) by the Microcystis cells or other organic matter in the natural water.