The experiment indicated that the germination rate,height of sprout,the length and number of root and seeding quality were raised,while the lack of germination and sprout rate were reduced with seed coating of corn.The panicle length,number of rows,spikelets per rows,1000-grain weight and grain yield were higher with seed coating treatment than those of the control.Eespecially,the production increase by 7.96%.The prevention and cure of underground pests,such as agrotis,young chafer and dustbrand,etc.were displayed to advantage with seed coating.To sum up,the treatment of seed coating brought high ecnomic profit and reduced the pollution by reducing the dosage of pesticide.