NOVELTY - Comprehensively processing ammonium nitrate effluent and flue gas comprises e.g.: collecting ammonium nitrate effluent into an ammonium nitrate effluent storage groove (1), introducing to a desulfurizer preparing groove (3) of a flue gas ammonia desulfurization device through an ammonium nitrate effluent conveying pump (2) to be treated as the supplement agent and supplement water, and supplying the insufficient parts with desulfurizer and desalting water according to the basicity and water content of the ammonia desulfurization process.    USE - The method is useful for comprehensively processing ammonium nitrate effluent and flue gas.    ADVANTAGE - The method: is simple; requires less investment and low maintenance; has high desulfurization efficiency; and is environmental friendly.    DETAILED DESCRIPTION - Comprehensively processing ammonium nitrate effluent and flue gas comprises: (a) collecting ammonium nitrate effluent into an ammonium nitrate effluent storage groove (1), introducing to a desulfurizer preparing groove (3) of a flue gas ammonia desulfurization device through an ammonium nitrate effluent conveying pump (2) to be treated as the supplement agent and supplement water, and supplying the insufficient parts with desulfurizer and desalting water according to the basicity and water content of the ammonia desulfurization process; (b) introducing flue gas, which has been dust removed and heat exchanged through a heat exchanger (7) from the bottom of a desulfurization tower (5), contacting with the ammonium nitrate effluent and desulfurizer inside the tower in a reversed manner, maintaining the temperature of the desulfurization tower at 30-60 degrees C and a gas-liquid ratio of 1000:2000, eluting acid pollutants of sulfur dioxide and nitrogen oxide of the flue gas through the ammonium nitrate effluent and desulfurizer for the processed flue gas to meet the nation discharge standard, and directly discharging; and (c) preparing ammonium nitrate solution with ammonium nitrate after the ammonium nitrate effluent and desulfurizer absorb the acid pollutant, removing the solution from the middle part of the desulfurization tower, letting into an air oxidizer, oxidizing through air bubbles and returning to the bottom of the desulfurization tower, removing the oxidized ammonium nitrate solution from the desulfurization tower, contacting with fresh flue gas inside the heat exchanger in a reversed manner to lower the temperature of the flue gas and simultaneously concentrating ammonium nitrate and ammonium sulfate, introducing the concentrated ammonium nitrate and ammonium sulfate saturated solution into a stirring crystallizing groove, further crystallizing at 40-50 degrees C at a stirring rate of 100-200 rotations per minute, filtering using a centrifugal filter, drying with a drier and packing using a packing machine to form the ammonium nitrate/sulfate with high nitrate content, and circulating the crystallizing mother liquid completely to the desulfurization tower.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic representation of the ammonia desulfurization device.    Ammonium nitrate effluent storage groove (1)    Ammonium nitrate effluent conveying pump (2)    Desulfurizer preparing groove (3)    Desulfurization tower (5)    Heat exchanger (7)