The research aims to study the impact of the change in rainfall on wheat Productivity in al-Hasakah station in the Eastern Province. and to achieve the objectives of the research were to adopt a time series first one from 1991 until 2010,was used and divided by two equal period stretching from 1991 until 2000, and the second period extends from 2001 until 2010, and so on quarterly and annual level for the amount of rain and the productivity of wheat, and Study the effect of rainfall in both periods on wheat production.