The invention discloses corn yield improvement accelerant. The corn yield improvement accelerant is composed of zhongshengmycin, cyprosulfamide, cysteine, plant growth regulator agents, zeatin, 2,4-dichlorobenzene oxygen butyl acetate, nanometer titania, abamectin and alginic acid. The corn yield improvement accelerant is a compound and efficient type accelerant, the proportion is reasonable, the accelerant has the great functions of promoting cell enlargement and division, promoting synthesis of nucleic acid and protein, suspending organ abscission, crop aging and chlorophyll synthesis, improving photosynthetic rate, enhancing the stress resistance, breaking apical dominance, promoting fruit setting, enlarging the fruits and inducing parthenocarpy, the cob rate is high, cobs are big, the grains are starlatine, and under the normal growth environment, the yield per mu is increased by 250 kilograms at the minimum. The corn yield improvement accelerant has a great effect for preventing and treating field diseases caused by bacteria and fungus, the chemical dosage is reduced, the chemical cost is reduced, no residues exist, the accelerant is convenient to use, the operation and implementation are easy, the dosage is little, and the cost is low.