The invention discloses a method for the gradient oxygen-increasing combustion supporting of a glass melting furnace and a special gradient oxygen-increasing combustion-supporting system. The system comprises an air separator; the system is characterized in that an oxygen collection tower is connected with an outlet end of the air separator through a pipeline, and an oxygen outlet of the oxygen collection tower is respectively connected with a low pressure distribution pipeline and a high pressure distribution pipeline which is connected with a tee joint reversing port through a tee joint distribution port which is connected in series by a pipeline; the end parts of the low pressure distribution pipeline and the high pressure distribution pipeline are connected with a regulating valve, a flowmeter and an oxygen combustion-supporting spray gun which are respectively communicated with one another; the oxygen combustion-supporting spray gun is assembled below a fire port which is formed on the side wall of the glass melting furnace and is matched and fixedly connected with a combustion spray gun which is fixedly assembled on the side wall of the original furnace; and oxygen with different pressures is respectively filled into an inner pipe and an outer pipe of the oxygen combustion-supporting spray gun on the bottom of a fuel spray gun, so that the flame temperature of the glass melting furnace is distributed in gradient, the unit glass energy consumption and NOx emission of the glass melting furnace can be effectively reduced, and the method and the system are suitable for being industrially popularized and applied.