A flame two-gun cutting device comprises a trolley assembly, a cutting device and a gas supply device. The cutting device and the gas supply device are installed on the trolley assembly. The gas supply device is provided with a gas distributor which is connected with the cutting device through a gas supply hose. The cutting device is provided with a cutter, a front cutting tip and a rear cutting tip, wherein the front cutting tip and the rear cutting tip are arranged on a cutter body, a fixing plate used for fixing the front cutting tip and the rear cutting tip is arranged between the front cutting tip and the rear cutting tip, adjusting holes through which the front cutting tip and the rear cutting tip are allowed to be installed and the distance between the front cutting tip and the rear cutting tip is adjusted are formed in the fixing plate, and the front cutting tip and the rear cutting tip can be independently adjusted transversely, vertically and angularly through shafts installed in the adjusting holes in the fixing plate. The flame two-gun cutting device is convenient to operate, two guns can be used for cutting at different angles in a front-back mode at the same time, the requirement for large-obtuse side slope machining can be met through one-time cutting, and cutting efficiency and assembly welding quality are greatly improved; the problems of board deformation and chemical component changes caused by excessively long heating time are solved.