NOVELTY - A lithium iron phosphate material comprises raw materials such as lithium iron phosphate, control agents, thermoplastic starch, nitrogen-containing conjugated polymer and auxiliary agent, where the lithium source is nitrate and lithium hydroxide, the iron source is ferric nitrate, ferrous acetate, ferric chloride and ferrous chloride, the phosphorus source is diammonium hydrogen phosphate and ammonium dihydrogen phosphate, the soluble magnesium salt is selected from fiber lithium iron phosphate as a control agent, and the auxiliary agent is lubricating agent.    USE - Lithium iron phosphate material.    ADVANTAGE - The lithium iron phosphate material has high crystallinity, high stability and controllable shape.    DETAILED DESCRIPTION - A lithium iron phosphate material comprises raw materials such as 95-100 pts. wt. lithium iron phosphate, 0.5-1 pts. wt. control agents, 3-5 pts. wt. thermoplastic starch, 1-3 pts. wt. nitrogen-containing conjugated polymer and 0.2-0.5 auxiliary agent, where the lithium source, iron source, phosphorus source according to mol ratio of 1:1:1, the lithium source is nitrate and lithium hydroxide, the iron source is ferric nitrate, ferrous acetate, ferric chloride and ferrous chloride, the phosphorus source is diammonium hydrogen phosphate and ammonium dihydrogen phosphate, the soluble magnesium salt is selected from fiber lithium iron phosphate as a control agent, the shape-controlling agent is selected from sodium oxalate, potassium oxalate, ammonium oxalate and sheet-shaped lithium iron phosphate, the gas phase silicon dioxide spherical lithium iron phosphate as a control agent, the thermoplastic starch is obtained through plasticizing polyhydric alcohols with a thermoplastic processability of starch, the nitrogen-containing conjugated polymer is polyvinyl carbazole (PVK), polypyrrole (PPy) and polyaniline (PAn), the auxiliary agent is lubricating agent. An INDEPENDENT CLAIM is also included for a method for preparing a lithium iron phosphate material, which involves utilizing disk screw reactor with different control agent, inhibiting the lithium ion phosphate by reducing growth phase of different crystal surfaces to obtain fibrous, spherical morphology of lithium iron phosphate, adding proper amount of buffering solution for maturating and uniform mixing for 24-48 hours, mixing thermoplastic starch, nitrogen-containing conjugated polymer, control agent and auxiliary agent in a vertical shaft type crusher to speed of 1200-1500 rpm at 800-1200 degrees C for 5-15 minutes through blade cutting and high speed airflow collision for crushing process to make the thermoplastic starch, nitrogen-containing conjugated polymer and the lithium iron phosphate raw material reaction, followed by subjecting pre-reaction material into a screw reactor type through continuous thermoplastic of millstone-type screw extrusion reactor, homogenizing, crystallizing reaction, carbide cutting to form a lithium iron phosphate material of different appearance.