The invention discloses a method for synthesizing a spherical-like porous structured iron phosphate precursor and a lithium iron phosphate positive electrode material. The method is characterized by comprising the steps of preparing micron-level iron phosphate precursor particles; performing continuous stirring while performing continuous growth of a mixture of iron phosphate and ferric hydroxide on the original micron-level iron phosphate precursor particles by controlling the pH and material inlet rate of a reaction liquid, then lowering pH, dissolving ferric hydroxide to generate the spherical-like porous structured iron phosphate precursor; and performing carbon coating, lithium mixing and calcining on the spherical-like porous structured iron phosphate precursor particles to prepare the lithium iron phosphate positive electrode material. The material has multiple holes, the specific surface area is enlarged, the contact area between an electrolyte and the positive electrode material is enlarged, and the shortcomings of poor conductivity and rate capability of the micron-level lithium iron phosphate particles can be solved; and meanwhile, the advantages of relatively high tap density, low cost and simple process are maintained.