NOVELTY - Reduction of carbon dioxide emissions in liquid carbon dioxide production comprises denitrifying acetylene and hydrocarbon impurities, adsorbing to nitrogen to outflow oxygen, and feeding carbon dioxide gas containing mechanical water, sulfur, methanol, methane, ethane, propane, ethylene, and other impurities to first compressor; mixing with oxygen, and compressing to remove carbon dioxide gas; desulfurizing; removing hydrocarbon from impurities; purifying by adsorbing impurities; liquefying; distilling; condensing flash vapor, and converging with liquid carbon dioxide.    USE - Method for reduction of carbon dioxide emissions in liquid carbon dioxide production (claimed).    ADVANTAGE - The method greatly reduces carbon dioxide discharge amount.    DETAILED DESCRIPTION - Reduction of carbon dioxide emissions in liquid carbon dioxide production comprises:    (A) subjecting acetylene and hydrocarbon impurities, e.g. dry air to orifice plate flowmeter control valve, introducing to denitrification tower, contacting dry air with zeolite, adsorbing nitrogen, outflowing oxygen to the top of tower, and feeding carbon dioxide gas containing mechanical water, sulfur, methanol, methane, ethane, propane, ethylene, and other impurities to first compressor;    (B) mixing with outflowed oxygen, compressing at 0.25-0.35 MPa, subjecting to secondary compression at 0.9-1.2 MPa, removing carbon dioxide gas containing oxygen impurity, water cooling to room temperature, passing through water separating machine, and introducing to desulfurization;    (C) contacting carbon dioxide gas containing oxygen, sulfur, methanol, methane, ethane, propane, ethylene, and other impurities with activated carbon in the bottom of desulfurization tower, adsorbing hydrogen sulfide gas containing oxygen and carbon dioxide impurities, desulfurizing, outflowing carbon dioxide gas containing oxygen, methanol, methane, ethane, propane, ethylene and other impurities to the top of tower, and introducing to dealkylation process;    (D) removing hydrocarbon of methanol, methane, ethane, propane, and ethylene impurities, reacting with excess of oxygen at 480-520 degrees C and at 0.9-1.2 MPa in the presence of platinum and palladium as active components and alumina catalyst to obtain carbon dioxide and water containing no trace amount of methanol, methane, ethane, propane, oxygen and ethylene, separating traces of water vapor from carbon dioxide gas, water cooling, mechanically separating water, and introducing to purification process;    (E) adsorbing impurities at room temperature using temperature swing adsorption process, high-temperature desorbing trace amounts of methanol, methane, ethane, propane, ethylene, oxygen, and water vapor impurities by filling purifier with alumina and silica gel at ppm level, selectively adsorbing traces of methanol, methane, ethane, propane, and ethylene at ppm level, purifying carbon dioxide gas, and introducing purified product containing non-adsorbed trace amounts of methanol, methane, ethane, propane, ethylene, oxygen, and other impurities to secondary compression;    (F) compressing at 2.8-3.3 MPa and at 110-120 degrees C, passing through heat exchanger;    (G) liquefying, introducing liquefied carbon dioxide into distillation tower, and distilling flash vapor in the lower part of tower to obtain liquid carbon dioxide; and    (H) passing flash vapor through lower and upper corrugated plate structured packings, and to lower and upper heat exchanger pipes, condensing into small carbon dioxide gas and large amount of methanol, methane, ethane, propane, ethylene and oxygen gas mixture, distilling to purify, reducing temperature, introducing to upper part of lower heat exchanger shell pass, decompressing to 0-0.05 MPa, converging liquid carbon dioxide and flash vapor in storage tank to obtain converged air flow, cooling with purifier adsorbent, washing against the direction of adsorption, cooling, and introducing to heat exchanger; heating carbon dioxide gas containing unabsorbed methanol, methane, ethane, propane, ethylene, oxygen, and other impurities to 180-235 degrees C, thermally desorbing impurities, purifying in adsorption tower, washing against the direction of adsorption, desorbing impurities to regenerate adsorbent as exhaust emissions.