The invention relates to a high temperature singeing fire hole, which comprises an elongated shell, and fire bricks arranged above the shell, wherein the shell is internally provided with a cavity which comprises an expansion chamber, a jet flow compression chamber and a fire outlet from top to bottom in turn; the bottom of the expansion chamber is provided with a fuel gas delivery pipe; the fireoutlet is provided with an inverted T-shaped fire nozzle, the bottom of the fire nozzle is provided with a plurality of air flues, and the upper part of the fire nozzle is clamped with the fire outlet to form two fire outlet paths; and two fire bricks are positioned on two sides of the fire outlet paths. By using the inverted T-shaped fire nozzle to match with structures of the expansion chamber,the jet flow compression chamber, fire bricks and the like, fuel gas is burnt stably and sufficiently in the fire hole, the singeing temperature can reach between 1,150 and 1,350 DEG C, and the energy-saving efficiency is greatly improved compared with the prior products, taking No. 90 gasoline with a breadth of 1.8 meters as an example, the energy consumption is 6 liters per hour which is just 50 to 60 percent of the energy consumption of the prior products, thus the production cost is greatly reduced.