Todorokite was synthesized through microwave heating from a layer structured precursor buserite prepared by O2 oxidation of Mn(OH)2 .The effects of several synthesis parameters under microwave heating including microwave power,temperature,time and the initial pH on the phase transformation from buserite to todorokite were investigated.The results showed that the well-crystalline and uniform sized todorokites were obtained under microwave heating conditions.Todorokite could not be synthesized under 150 W power of microwave radiation.The reaction time of synthesizing todorokite decreased with the increase of microwave power.Todorokite could be obtained in 20 minutes with 600 W of microwave radiation.The higher the temperature for synthesizing todorokite,the shorter the reaction time required.Todorokite could not be obtained at 100 ℃,nevertheless it could be synthesized in 20 minutes when the temperatue reached 140 ℃.In acidic medium,the formation rate of todorokite was low and poor-crystalline phase was produced.Whereas in neutral and alkaline medium,the formation rate of todorokite was high and well-crystalline phase was obtained.