The invention discloses a method for comprehensively utilizing titanic iron ore to prepare a precursor of the lithium iron phosphate, which is characterized in that titanium iron ore is immerged into an acid, filtering, a quantitative other ore resource is dissolved in the filtered solution, making the Fe concentration in the mixed solution to be from 0.01 to 3 mol/L and the molar ration of Ti to Fe to be from 0.0005 to 0.3; an oxidant and a sedimentation agent are put into the solution, wherein the concentration of the oxidant and the sedimentation agent is from 0.01 to 3 mol/L, using an alkaline solution from 0.01 to 6 mol/L to control pH value of the system between 1.5 and 6.0, reacting for from 5 minutes to 24 hours in an agitating reactor at a temperature of between 20 and 90 degree centigrade, the attained sedimentation is rinsed and filtered, the precursor of the lithium iron phosphate for the anode material of a lithium-ion battery is got after the attained sedimentation continues to be dried at a temperature of between 50 and 200 degree centigrade, and the precursor is a mixture of ferric phosphate and doped phosphate. The method for comprehensively utilizing titanic iron ore to prepare the precursor of the lithium iron phosphate has the advantages of wide raw material resource, simple process procedure, good and stable product quality, and low cost, which is particularly applicable to provide the high quality iron resource for the volume production of the lithium iron phosphate for the anode material of the lithium-ion battery and comprehensively utilize the titanic iron ore resource as well.