The invention discloses a lithium-ion battery positive material-lithium vanadium phosphate, and the preparation method thereof, the main technical proposal is to enhance the purity of positive material and simplify the synthesizing method. The positive material in the invention is provided with a base body of lithium vanadium phosphate, carbon materials are coated outside the base body, the positive material is provided with some microscopic features like spheres, semi-spheres with the length of long axis and short axis of 5-30 micron, diamonds, cones, flakes, laminates and / or blocks, the size thereof is 5-30 micron, and the specific surface area is 5-15m2 / g. The preparation method includes preparing nano particles, liquid mixing reacting, preparing precursors, pretreament, activated roasting, coating the organic materials which can be carbonized, and then high-temperature processing. Compared with the prior art, by utilizing the nano particle secondary-molding liquid method for synthesizing the positive material-lithium vanadium phosphate, the invention simplifies operation processes and reduces production cost, with the positive material with higher charging-discharging capacity and excellent cyclical steady.