Abstract: With application of the materials of two sorghum coenospecies: 623×276、7501×283 and parent strain seeds of their three lines, by the approach of artificial acceleration of aging, changes on germination, seed activity and electrical conductivity in the aging process of seeds were studied. The results demonstrates:(1)Germination indexes and activity of seeds obviously decreased when seeds were treated in the condition of high temperature(54±1)℃ and high humidity(100% relative humidity) and obturation and less treatment time than 36h. Germination indexes and activity of seeds of 623×276, 623B ,283R increased obviously than controls when treatment time was 24h. And when time was as many as 36h, those indexes of 623A were also obviously higher than those of the control. (2) Electrical conductivity of seeds increased as a uneven speed with the extent of treatment time in the process of aging; it decreased in some treatment time.(3)On the basis of analysis of change of germination ,activity and electrical conductivity of seeds, abilities to aging resistance of two varieties are different from those of seeds of their three lines: seeds of 632×276、623A、623B、283R、7501×283 are relatively aging resistant while the abilities to aging resistance of seeds of the three lines are comparatively low.