The invention discloses a method for removing NOx in sintering flue gas through a low-temperature SCR (Selective Catalytic Reduction) catalyst based on a metallurgy coke nut adsorbent. The method comprises the following steps: (1) smashing and sieving defective coke to obtain metallurgy coke nut; (2) cleaning the metallurgy coke nut with clear water, draining, and placing the drained metallurgy coke nut into a drying oven of which the temperature is 120 DEG C to perform constant-temperature drying for 2 hours; (3) performing high-temperature water vapor activation on the dried metallurgy coke nut; (4) selecting V2O5 to serve as an active component of the low-temperature SCR catalyst, selecting an ammonium metavanadate solution to serve as a precursor of V2O5, and soaking the metallurgy coke nut into a solution of which the V2O5 concentration is 6 percent and a solution of which the V2O5 concentration is 10 percent respectively for 16 hours through a soaking process to obtain a metallurgy coke nut low-temperature SCR de-nitration catalyst; (5) taking out a sample, placing the sample into an air blast drying box to dry for 3 hours, then placing the sample into a resistance furnace, and calcining in a nitrogen atmosphere at the temperature of 600 DEG C for 2 hours in order that the ammonium metavanadate is fully decomposed to obtain a V2O5-loaded modified metallurgy coke nut catalyst.