On 21^st July in 2012,the most severe disaster resulted from extra torrential rains since 1949 happened in Beijing City.Based on the traits of the floods and rains and the disaster situation,as well as the damage of soil and water conservation facilities,the vegetation measures for both disaster mitigation and ecological regulation and the function of watershed management on storms disaster reduction were analyzed.The proposals of strengthening the efforts of regular monitoring on soil and water conservation and accelerating the constructions of defensive measures on monitoring and predicting model,as well as monitoring,and warning system of soil and water conservation were put forward.