▎ 摘　　要

NOVELTY - Preparing lithium iron phosphate anode material comprises preparing lithium iron phosphate anode material with nano zinc oxide coating layer and graphene coating layer from the inside to the outside by comprehensively utilizing blast furnace ash. USE - The method is useful for preparing lithium iron phosphate anode material. ADVANTAGE - The method re-uses zinc, carbon and iron contained in blast furnace ash to prepare lithium iron phosphate anode material, uses analytically pure raw materials, and greatly reduces production costs. The material has double coating layer of zinc oxide and graphene, more uniform coating, and good electrochemical performance. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) lithium iron phosphate anode material, where lithium iron phosphate anode material is sequentially from the inside to the outside comprising carbon-doped lithium iron phosphate anode material substrate, nano zinc oxide coating layer, and graphene coating layer; and (2) lithium ion battery, comprising anode sheet, cathode sheet, electrolyte and diaphragm, where the anode sheet comprises lithium iron phosphate anode material.