TECHNOLOGY FOCUS - METALLURGY - Preferred Component: The lithium salts are preferably lithium hydroxide or lithium carbonate. The ferrite is preferably green copperas or ferrous ammonium sulfate. Preferred Method: The dissoluble ferrite, lithium salts and phosphoric acid are confected according to stoichiometric proportion, whose total consistency is 0.1-3 mole/L of the reaction system. A precipitator from ammonia, ammonia bicarbonate or carbamide is added in the synthetic process. It is added in an amount of 0.1-1 mole/L. The method comprises in 35-40degreesC, adding the surface active agent to deionized water of high-pressure autoclave and stirring to completely dissolve the surface active agent in the water, where the aqueous solution consistence of the surface active agent is 0.5-3 wt.%; confecting the dissoluble ferrite and phosphoric acid according to stoichiometric proportion, dissolving by water, preparing the solution whose consistency is 20-30 wt.%, and then adding it to the reaction autoclave of the adding step; along with stirring constantly, adding lithium salt with stoichiometric proportion in the reaction autoclave of the confecting step, where pH is 7-9 (preferably 7.2-8) and filling centigrade is 70-80%, and then sealing the autoclave and stirring tempestuously; controlling the temperature of the reaction autoclave to be 40-100degreesC and reacting for 5-10 hours, then processing the hydrothermal reaction with 150-200degreesC for 5-14 hours, and then cooling to room temperature; and cleaning the reaction product 2-3 times by using distilled water, filtration and separation, parching the obtained solid material in 40-50degreesC in the protection of nitrogen, drying it in 80-100degreesC for 1-2 hours, drying it under 200degreesC for 1-2 hours, then heating up by temperature-rising speed of 5degreesC/minute till 600-700degreesC and roasting for 5-10 hours, to obtain a uniform-dispersion lithium iron phosphate (LiFePO4)/carbon composite material whose uniform particle diameter is 0.2-0.5 microns. The temperature of the reaction autoclave is controlled to respectively be 100 and 200degreesC.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Component: The surface active agent is hexadecyl trimethyl ammonium bromide or polyethyleneglycol. The surface active agent is added in an amount of 0.01-0.3 mole/L.