With the rapid advancement of science and technology, we have developed an unprecedented innovative process that breaks away from traditional hydrothermal-aging-washing-filtration synthetic routes. The main feature is that there is no waste gas and sewage discharge, no ammonium sulfate, sodium sulfate and acid recycling and other processes, rational use of iron sources, phosphorus sources and no residues of cheap additives.Through technological optimization and innovation, high purity anhydrous iron phosphate has been synthesized. The product has outstanding physical indexes and excellent electrochemical performance, and the green synthesis of high density anhydrous iron phosphate has been realized. The production cost is low, and it is safe and environmental protection. At present, this process technology has been put into production in batch by our company, and fully automatic control is realized. This process technology is currently in the absolute leading level of the industry.