Abstract: Utilize the materials of output of the wheat and corresponding precipitation materials of 1958-2004 year of Suixi county, Carry on synchronous statistical analysis, The result shows : Wheat meteorological output sow wheat divide into tiller and turn green remarkable positive correlation of precipitation , wheat of jointing stage, Shoulder with the precipitation of mature period notably relevantly with earing. The suitable precipitation is: Soil moisture water60~120mm, Precipitation in breeding time220~290mm. Precipitation is moderate in total amount in the wheat production process of Suixi county, Slightly show insufficiently in some period, The drought exceeds the waterlogging, Optimize the structure of variety, While the moisture in the soil is sown early, Easy to water to sow the soil moisture water, Divide tiller survive the winter ink and Jointing booting water, Collect the rain and preserve soil moisture.