NOVELTY - Fuel emulsified and combustion-supporting composite combustion method comprises heating and mixing 90-75 wt.% oil and 10-25 wt.% water, and implementing a first magnetization, a first emulsification, a second magnetization and a second emulsification to obtain a twice magnetized and twice emulsified ingredient A of emulsified fuel; electrolyzing the water to generate an ingredient B of activated water containing hydrogen gas and oxygen gas; catalytic cracking the fuel to obtain an ingredient C of mixture of fuel and hydrocarbon; and mixing the ingredients and combusting.    USE - Fuel emulsified and combustion-supporting composite combustion method.    ADVANTAGE - The method has high efficiency and low energy consumption.    DETAILED DESCRIPTION - A fuel emulsified and combustion-supporting composite combustion method comprises:    (A) synchronously heating the filtered and purified fuel and water to raise the temperature to 75-85 degrees C, mixing 90-75 wt.% oil and 10-25 wt.% water, feeding the mixture into a magnetizing device at velocity of less than 10 cm/s, and implementing a first magnetization; implementing a first emulsification to the oil-water mixture by a primary emulsifying device, and making the grain diameters of dispersed oil-coating water beads achieve the micron grade at a rate of 90%; feeding the mixture into the magnetizing device at velocity of 15 m/s to 20 cm/s for a second magnetization; feeding the mixture into a secondary emulsifying device for a second emulsification, and making the grain diameters of dispersed oil-coating water beads achieve the micron grade at a rate of 90% to obtain a twice magnetized and twice emulsified ingredient A of emulsified fuel;    (B) regulating the pH value of filtered and purified water within 8-9, flowing through an activated water generating device, and electrolyzing the water to generate an ingredient B of activated water containing hydrogen gas and oxygen gas;    (C) flowing the fuel through a cracking device at velocity of 0.2-0.8 m/minute, catalytic cracking the 3-10% fuel into the combustible hydrocarbon with less molecular weight; at this time, the volume ratio of fuel flowing through the catalytic cracking device and the catalyst is 0.5-1: 1-2, the temperature of catalytic cracking device is 250-300 degrees C, and obtaining an ingredient C of the mixture of the fuel and the hydrocarbon with less molecular weight than that of original fuel;    (D) separately using metering pumps to measure the twice magnetized and twice emulsified ingredient A of emulsified fuel, the ingredient B of activated water containing hydrogen gas and oxygen gas and the ingredient C of the mixture of the fuel and the hydrocarbon with less molecular weight than that of original fuel, regulating the weight proportions of three ingredients A-C as 90: 1.5-2.5: 10, continuously pumping the ingredients to the nozzles under a pressure of 6-8 kg/cm2, injecting into a combustion chamber, mixing and combusting in the combustion chamber, where the total content of the water in ingredients A-C injected into the combustion chamber is 15-25 wt.%.    The filtered and purified water passes through a lye tank stored with 0.2 wt.% sodium hydroxide (NaOH) or potassium hydroxide (KOH) or strong alkaline solution composed of NaOH and KOH in arbitrary mixture ratio. The pH value of water is regulated within 8-9 by a pH regulator. The inlet and outlet of the catalytic cracking inner tube are provided with stainless steel nets.    DESCRIPTION OF DRAWING(S) - The drawing is a schematic flow diagram of the fuel emulsified and combustion-supporting composite combustion method.