The invention discloses a method for recovering pyridines debromination catalyst in the technique for producing 7-dehydrogenization cholesterol (DHC). The existing recovery method has the defects of difficult operation, high environmental pollution, poor stability, low recovery rate, high production cost and the like, so as to limit the large-scale industrialized production of 7-DHC at one time. The method is characterized in that after being mixed with solvent, debromination residual obtained by debromination reaction is added with activator, and then the temperature of a reaction system raises to 60-100 DEG C for heat preservation reaction; after the reaction, filtration is carried out, and the obtained filtrate is the mixture of the debromination catalyst and the solvent; the activatoris small molecular strong polar material with low boiling point. The method has the advantages of mild reaction condition, no pollution, good stability, high recovery rate, low production cost and the like, so as to simplify the operation, produce sodium bromide with higher purity as byproduct, and be applicable to the large-scale industrialized production.