Combustion chamber flame tube and efficient cooling method thereof

The invention provides a combustion chamber flame tube and an efficient cooling method of the combustion chamber flame tube. A combustion chamber flame tube comprises a tube body, and cooling holes and cooling grooves/seams on the tube wall of the tube body. The cooling holes and the cooling grooves/seams are sequentially arranged and communicated with one another in the thickness direction of the cylinder wall, and external air enters the inner cavity of the cylinder body through the cooling holes and the cooling grooves/seams in sequence; the extension length of the cooling hole is greater than the aperture of the cooling hole; the length of the cooling groove/seam is larger than the width of the cooling groove/seam in the direction perpendicular to the gas inflow direction. External gas cools the outer wall and the interior of the combustion chamber flame tube, the speed is increased after the external gas passes through the cooling holes and the cooling grooves/seams, a gas film layer which has a large co