A method of synthesizing ferrate, which includes the steps of: (a) weighing and obtaining iron salts, activating agents, alkalinizing agents and oxidizing agents solution (b) mixing uniformly the iron salts, the activating agents and the alkalinizing agents, heating to 30˜398° C. and maintaining for 1 min˜60 min to obtain a mixture (c) adding the oxidizing agents solution to the mixture with an adding time of less than 10 minutes, then obtaining a precursor and (d) natural cooling the precursor, then mixing the precursor with water and stirring evenly to obtain a final product of ferrate, wherein a volume ratio of the precursor and the water is 1:1˜5. The method involves low power consumption, low temperature, low explosion risk, non-complicated steps and procedures, short synthetic time and high ferrate conversion efficiency. The method produces ferrate of high yield and good stability, and is suitable for producing ferrate composite pharmaceuticals in industrialized mass production.
