Two maize seeds of varieties Jinongda 578 and Xinbaidan 31 were selected as experiment materialsand they were artificial aged by high temperature（45 ±1° C） and high humidity（95% relative humidity）. The germi-nation characteristics, vigor characteristics and seed chemical composition and the possible correlation betweeneach characters were studied. The results showed that along with the extending of aging treatment time, the germina-tion energy and germination percentage of two varieties of seeds decreased. The vigor index of the two varieties de-creased from 24 hours after treatment. The longer the aging time, the lower the seedling heights and the shorter theroot length, and the more significant effect on root. The chemical composition percentage of seeds were not affectedby length of artificial aging time. The germination index and vigor index had significant correlation with the contentof starch and oil of seeds（P＜0.05） to some extent.