▎ 摘　　要

NOVELTY - The method comprises spray-drying the mixture containing the solid phase to obtain a lithium iron phosphate composite material precursor, where the solid phase includes lithium source, iron source, organic carbon source, dispersant and graphene. The solid phase also includes a phosphorus source when the iron source does not contain phosphorus. The solid phase includes or does not include a phosphorus source when the iron source does not contain phosphorus. The graphene is small sheet diameter graphene and large sheet diameter graphene. The sheet diameter of the small-diameter graphene is 20% to 60% of the target particle diameter of lithium iron phosphate. The sheet diameter of the large-diameter graphene is 50-100% of the square root of the target surface area of lithium iron phosphate. The precursor of the lithium iron phosphate composite material is sintered to obtain the lithium iron phosphate composite material. USE - Method for preparing lithium iron phosphate composite material, which is useful as cathode material in lithium battery (claimed). ADVANTAGE - The method reduces the probability of graphene collision during the crushing process, which makes the graphene not easy to fall off, and reduces the internal resistance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for lithium iron phosphate composite material.