The present invention relates to a composite cathode active material and a method of preparing the same, and a cathode and a lithium battery includes the composite cathode active material. The composite cathode active material includes: a secondary particle including a plurality of primary particles including a lithium transition metal oxide having a layered crystal structure; and a coating layerdisposed on a surface of the secondary particle and between the primary particles of the plurality of primary particles, wherein the coating layer includes a lithium cobalt composite oxide having a spinel crystal structure, and wherein the lithium cobalt composite oxide includes cobalt (Co) and a Group 2 element, a Group 12 element, a Group 13 element, or a combination thereof.