The invention belongs to the field of fluidized beds and multi-phase flow, and particularly relates to a chemical looping combustion air reactor for enhancing oxidation regeneration of an oxygen carrier. The chemical looping combustion air reactor comprises a reaction chamber, a first lift pipe, a composite internal member and a second lift pipe, wherein a feeding port is arranged on the side wallof the reaction chamber; an air inlet is arranged at the bottom of the reaction chamber; the reaction chamber and the first lift pipe are connected by adopting a first reducing pipe; and the composite internal member is mounted between the first lift pipe and the second lift pipe, and comprises a second reducing pipe, a ring-shaped internal member, a guide pipe, a supporting plate and an inclinedring-shaped internal member. By the adoption of the chemical looping combustion air reactor, the problem that in the prior art, the radial distribution of an oxygen carrier in a lift pipe is not uniform and the oxidation regeneration efficiency is not high can be solved; and the residence time of the oxygen carrier can be effectively prolonged, the oxidation regeneration efficiency of the large-grain-size oxygen carrier can be improved, and then the chemical looping combustion efficiency can be improved.