Abstract: The research on the application effects of “Green Drought Resistance agent” in winter wheat in dry land and enduring-drought mechanism was conducted during 2002~2004 in Taiyuan and Linfen, Shanxi. The results showed that “Green Drought Resistance agent NO.1, NO.2 and NO.3” harmonized ear number, spike number and 1000-seed weight of winter wheat in dry land, they have good yield-improving effects. The drought-enduring experimentation showed that with the raising of the PEG density, the restrain that burgeon and rootage got on each treatment were more obvious. The drought resist of burgeon ratio, length of bud, rootage ratio, number of root and length of root treated by GDR1 was better than check’s. The result of the burgeon ratio, sprout and root growth treated by GDR1 under different soil-water conditions was consistent to its under different PEG density, this showed that GDR1 had a good resistibility on water-menace. The study explored a new area for applying grow regulator to winter wheat in dry land.