Method for preparing a cathode active material for lithium secondary batteries.

The present invention relates to a cathode active material for a lithium secondary battery, a method for preparing the same, and a lithium secondary battery including the same, and provides a cathode active material including Li 2 MnO 3 having a layered structure, and doped with one or more elements with a multiple oxidation state selected from the group consisting of W, Mo, V, and Cr, and a fluoro compound.