Severe drought happened in Huanghuaihai Plain in spring of 2011.This study was carried out in areas mostly hit by drought,including Hebei,Henan,Shandong and Anhui.The results showed that spraying drought resistance agent could improve wheats ability to resist drought and other environment stress,such as hypothermia,freezing and hot wind etc.Although experienced damages of severe droughts and environment stress,compared with the control,the results of the treats of 2 to 7 showed that:1)The length of ears improved obviously;2)Effective ears improved by 19.15%;3)The yield improved by 7.3% on average;4)The economic income improved 1 147.5 Yuan/hm2.