Based on the data of 5, 10, 15, 20 cm soil temperature during the period of 1971-2005 and observations ofwinterwheat growing stages from 1981 to 2005 in Gansu loss plateau, the temporal change of soil temperature and its impactonwinterwheatgrowth period were analyzed. The results show that the 10 cm soil temperature presented increasing trend inwinter, spring and autumn. There was negative relation between soil temperature and growing stages ofwinterwheat, and inwinter themilk stage ofwinterwheatwas obvious related with the correlation coefficient of -0. 57 --0. 65, and in spring the green stagewas themost significant related with the correlation coefficient of -0. 60- -0. 63.