The invention discloses a silica gel modified desulfurizing agent. The silica gel modified desulfurizing agent consists of the following raw materials in parts by weight: 26-30 parts of tetraethylortho silicate, 3-4 parts of aluminium dihydrogen phosphate, 1-2 parts of polyvinyl alcohol, 0.7-1 part of ethylene bis stearamide, 15-20 parts of tetrabutyl titanate, 2-3 parts of cyanoethyl cellulose, 3-5 parts of lime powder, 2-3 parts of sodium myrastate, 0.8-1 part of lauryl alcohol phosphoric acid ester potassium, 2-3 parts of palm wax, 0.1-0.2 part of ammonium ferrous sulfate, 0.5-1 part of dibutyltin dilaurate, 1-2 parts of trimethylolpropane, 2-4 parts of barium stearate, 0.7-1 part of 1-ethoxyl-2-oleic imidazoline and 5-8 parts of stannic oxide. The finished product is large in specificsurface area, high in activity, good in desulfurization performance, high in recycling frequency, good in stability and excellent in overall performance.