The present disclosure discloses a battery positive electrode material and a method for treating the battery positive electrode material and a battery. The method for treating battery positive electrode material includes: cold plasma treatment of at least part of the battery positive electrode material with carbon layer on the surface to be treated to have active particles doped in the carbon layer, where the doping amount is not less than 50 ppm. At least part of the surface of the positive electrode material of the battery contains a carbon layer and at least part of the surface has a rod-like shape. The carbon layer is a carbon layer doped with active particles after cold plasma treatment, and a high-sodium ion conductance NaF layer is formed on the surface of the positive electrode material. The method of the present disclosure can enhance the particle surface energy of the positive battery material, improve its interface affinity with the electrolyte, and obtain the positive electrode material with uniform texture, low porosity, high ionic conductivity and electronic conductivity.