Lithium iron titanium phosphate negative electrode material, lithium titanate battery and preparation method of lithium iron titanium phosphate negative electrode material

The invention provides a lithium iron titanium phosphate negative electrode material, a lithium titanate battery and a preparation method of the lithium iron titanium phosphate negative electrode material. The lithium iron titanium phosphate negative electrode material comprises the following components: lithium carbonate or lithium hydroxide, titanium dioxide, ferrous oxalate, ammonium dihydrogen phosphate or diammonium hydrogen phosphate or ammonium phosphate and activated carbon, all the components are mixed and then subjected to ball milling and high-temperature calcination, and the lithium iron titanium phosphate negative electrode material is prepared. A negative electrode material of the lithium titanate battery comprises the lithium iron titanium phosphate negative electrode material, and a positive electrode material of the lithium titanate battery comprises lithium manganate; the preparation method comprises the steps of preparation of the positive plate, preparation of the negative plate, preparati