The invention discloses a fertilizer for improving the stress resistance of corn. Raw materials of the fertilizer comprise pig manure, marsh mud, straw powder, fly ash, cake meal, urea formaldehyde, calcium nitrate, a calcium magnesium phosphate fertilizer, potassium dihydrogen phosphate, potassium chloride, agricultural rare earth, expanded perlite, borax, shell powder, animal bone meal, malic acid, tartaric acid, citric acid, humic acid, fulvic acid, a microbial agent, a microelement fertilizer, a plant growth regulator and a Chinese herbal medicine additive. The fertilizer for improving the stress resistance of corn has the advantages of reasonable formula, high fertilizer utilization efficiency, long fertilizer effect, realization of effective improvement of the soil environment and prevention of soil hardening after being applied, effective improvement of the stress resistance of the corn, promotion of the yield increase of the corn, effective improvement of the quality of the corn, good economic benefit, and promotion of the sustainable development of the agriculture in China.