NOVELTY - Producing hot pot fuel from waste oil comprises mixing waste oil and alcohol, heating, adding sodium hydroxide solution, stirring, adding vinegar, heating, reacting, placing in cold bath, treating, adding water, stirring, cooling, adding saturated sodium chloride solution, stirring to precipitate a solid, filtering to obtain a solid and a filtrate; and using the solid as first fuel product; adding water into first fuel product, heating, adding saturated citric acid solution; allowing to stand, cooling, and carrying out solid-liquid separation, where the solid material is finished pot fuel.    USE - The method is useful for producing hot pot fuel from waste oil (claimed).    ADVANTAGE - The method uses easy to obtain raw materials, has simple treatment technology, low production cost. The yield of the fuel is increased, the quality of the fuel is improved, and the burning firepower of the fuel is guaranteed; particularly in combination with control on technological parameters in the preparation process, the waste oil is optimized during production of the hot pot fuel.    DETAILED DESCRIPTION - Producing hot pot fuel from waste oil, comprises (i) mixing the waste oil and alcohol, adding into a heater, heating to 45-55 degrees C, adding 11-14 ml sodium hydroxide solution; continuously stirring using a stirrer at 60-90 revolutions per minute for 30-50 minutes, adding 0.5 vol.% vinegar, continuously heating, reacting for 3-5 hours, placing in cold bath, treating for 40-70 minutes, adding 30 ml water, placing in hot water at 45-50 degrees C, stirring at 60-80 revolutions per minute for 5-10 minutes, then cooling for 30-40 minutes in 5-10 degrees C cold bath; adding 2 volumes of saturated sodium chloride solution into the waste oil, stirring at 50-70 revolutions per minute to precipitate a solid, filtering to obtain a solid and a filtrate; and using the solid as first fuel product; (ii) adding 40 ml water into the first fuel product, heating to 60-80 degrees C, dissolving, stirring using a stirrer at 50-80 revolutions per minute to be dissolved completely, placing in the water temperature of 45-55 degrees C for 10-20 minutes, adding 9-11 ml saturated citric acid solution, controlling the water bath at 45-60 degrees C, and stirring at 80-100 revolutions per minute for 30-40 minutes; allowing to stand for 20-30 minutes, then cooling to room temperature and then placing under normal temperature environment, carrying out solid-liquid separation, where the solid material is finished pot fuel.