The invention belongs to the technical field of 
industrial gas burner and relates to a 
low emission high-power staged-
combustion gas burner. The staged-
combustion gas burner is characterized in that a swirling 
machine, a 
flame stabilizing plate, a central canister and a middle 
pipe are coaxially arranged in the 
throat of the burner main body from outer to inner, wherein the 
flame stabilizing plate is provided with a gas gun which is axially fixed and has same uniformly distributed radial lines. The gas 
collocation method comprises the following steps: (1) collocating no gas in a direct 
air channel, in which is low-speed central cooling air, (2) mixing the high-speed swirling air entered from a swirling 
air channel with the gas jetted from a small gas hole B on the gas gun along the radialdirection till reaching to the semi-premixed state before emerging from the 
throat of the 
gas burner, and (3) face-to-face jetting the gas from a big gas hole on the top of the gas gun, the high-speed swirling air and the high-speed 
peripheral axial air flow so as to form non-premixing 
diffusion combustion. Because of the air, the staged gas 
branch supply, the premixing combustion and the non-premixing 
diffusion combustion, the combustion is uniform and 
NOx is prevented from being generated. The 
discharge amount of 
NOx of the gas burner is 70% lower than that of the common burner in the priorart.