Combined combustion gun

The utility model provides a combined combustion gun which comprises an outer gun barrel and an inner gun barrel, wherein the inner gun barrel is coaxially sleeved with the outer gun barrel; a first combustion medium passage is formed in the inner gun barrel; a second combustion medium passage is formed between the inner gun barrel and the outer gun barrel; the front end of the outer gun barrel is movably connected with an outer hood; the front end of the inner gun barrel is movably connected with an inner gun nozzle; the periphery of the inner gun nozzle is sleeved with the outer hood; the outer surface of the inner gun nozzle is cone-shaped; the inner surface of the outer hood is cone-shaped; and a gap of 3 to 5 mm is formed between the inner gun nozzle and the outlet end of the outer hood. The combined combustion gun provided by the utility model can implement combined combustion between gas and gas and between gas and powder or single combustion of one combustion medium, can control the position of a flam