The experiment of multiple drought preventing techniques for winter wheat was conducted in October of 1998 to June of 2000.It is shown that abundant soil moisture,deep ploughing,returning corn straw into soil,straw mulching,spraying drought preventing agent and limited irrigation are effective measures to prevent drought in the growing season of winter wheat and increase yield.Thus,the yield of winter wheat can be increased by over 10% and water utilization ratio increased by over 30%,and the economic benefit increased by 500-800 yuan per hectare.