The invention provides a production method of high-magnification long service life lithium ion battery anode material TiN phase doped LiFePO4. The method comprises the following steps: firstly, performing electrochemical corrosion on iron powder so as to form an iron source; secondly, mixing materials, drying, crushing and screening the materials, namely, uniformly stirring the iron source, a phosphorus source, a lithium source, a carbon source, a doping agent or a doping agent raw material, and ethanol in a stirring mill, pumping the slurry, drying the slurry in a vacuum drying box, and crushing a clock precursor after being dried; thirdly, roasting lithium iron phosphate so as to prepare a lithium ion battery anode material, wherein the doping agent is TiN. Due to adoption of the production method, the conductivity of the lithium iron phosphate is improved, so that the magnification charge and discharge capability of the lithium iron phosphate is greatly improved, and the circulation property and the magnification property of a material are improved.