NOVELTY - Combined process for producing heat, electricity and acetylene using coal involves adding oxygen into boiler, inputting hydrogen into steam-turbo generator stator and rotor cooling passage, cooling generator, inputting coal and coal slag into coal-fired power plant storage milling system between boilers, adding obtained product into boiler to obtain electricity and heat energy using water, inputting coal powder, electricity, argon and hydrogen to generate plasma arc, performing coal pyrolysis reaction, rapidly quenching, and separating gas having acetylene, and coal slag.    USE - Combined process for producing heat, electricity and acetylene using coal (claimed).    ADVANTAGE - During combined process for producing heat, electricity and acetylene using coal, consumption of coal is reduced.    DETAILED DESCRIPTION - Combined process for producing heat, electricity and acetylene using coal by integrated plasma coal acetylene reaction device with fuel coal power plant production system involves electrolyzing water by inputting 95 kwh electricity and 2800 kg/hour water to generate oxygen and hydrogen in coal fired power plant hydrogen station, adding obtained 2300 kg/hour oxygen into boiler to perform oxygen-enriched combustion, inputting obtained 25 kg/hour hydrogen into steam-turbo generator stator and rotor cooling passage, cooling steam-turbo generator, inputting 950000 kg/hour coal and 1400 kg/hour coal slag into coal-fired power plant storage milling system containing pulverized coal powder having particle size of 1-300 mu m between boilers, adding obtained product into boiler to burn using 1000000 kg/hour water heated as high-temperature high-pressure steam to obtain 250 MW electricity and 350000000 kcal heat energy as power output from steam turbo-generator, inputting 3000 kg/hour coal powder, 12000 kwh electricity, 550 kg/hour argon and 250 kg/hour hydrogen into plasma generator to generate high-temperature plasma arc having temperature of 5000-8000 degrees C, performing coal pyrolysis reaction in the plasma reactor, rapidly quenching obtained product, subjecting obtained two phase gas-solid product to multiphase separator, and separating gas and 1300 kg/hour coal slag, such that gas separated by multiphase separator through gas separator contains 700 kg/hour acetylene as product gas, 500 kg/hour argon and 400 kg/hour exhaust gas.