Advanced gas turbine combustor diffuser

The invention provides an advanced gas turbine combustion chamber diffuser, which is applied to the technical field of combustion chamber diffusers, and is characterized in that at least one diffuser vent hole is formed in each of the outer wall of a diffuser type panel and the inner wall of the diffuser type panel; the diffuser type panel outer wall, the diffuser type panel inner wall and the flame tube head define a combustion chamber middle ring cavity channel, and the combustion chamber middle ring cavity channel is arranged in front of a diffuser air inlet. A combustion chamber outer ring cavity channel is defined by the outer wall of the combustion chamber casing and the outer wall of the diffuser type panel, and the combustion chamber outer ring cavity channel is arranged on the combustion chamber middle ring cavity channel; and the inner wall of the combustion chamber casing and the inner wall of the diffuser type panel define a combustion chamber inner ring cavity channel, and the combustion chamber