The invention relates to a manufacturing method of a positive pole lithium ferrous silicate material of a lithium-ion battery. The method comprises the following steps of: step 1, dissolving a lithium source compound, an iron source compound and a silicon source compound in a solvent, sequentially adding a carbon source compound and a surface active agent, and adjusting pH to 4-6 by organic acid to obtain a Li-Fe-Si-C mixture; and step 2, carrying out supercritical water-bath reaction on the obtained Li-Fe-Si-C mixture, filtering and washing the mixture to be neutral, and finally carrying out spray drying so as to obtain the positive pole lithium ferrous silicate material of the lithium-ion battery. According to the manufacturing method of the positive pole lithium ferrous silicate material of the lithium-ion battery, the positive pole lithium ferrous silicate material prepared by spray drying has uniform particle size and controllable shape, the conductivity of the positive pole lithium ferrous silicate material is effectively improved, and the manufacturing method is simple and convenient to synthetize.