The invention discloses a ternary cathode material with surface reaction covered and a preparing method of the ternary cathode material, and relates to the field of lithium ion batteries. The method includes the following steps of putting a surface reaction covering agent and ternary cathode material powder into a grinding device at normal temperature, grinding the materials and evenly mixing thematerials to obtain a mixture; putting the mixture in a tubular atmosphere furnace, raising and keeping the temperature, and conducting sintering to obtain an initial product; sieving the initial product through a 400-mesh sieve after grinding to obtain a final product. By means of the method, a covering layer can be formed on the surface of the material, the alkali content in the cathode materialis effectively reduced, and gases polluting the environment can not be generated in the preparing process, and the requirement of the corrosion resistance of the device is low; the cathode material prepared through the method has high specific capacity and capacity retention ratio.