Abstract: The paper aims to study the climatic characteristics and vantage point of forecast of the high temperature weather in East Hexi Corridor so as to improve the accuracy of high temperature forecast and to reduce the impact on agricultural production, high temperature of the East Hexi Corridor from July 17 to 30, 2010 was analyzed by means of synoptic and statistical method from the aspects of climatic characteristics, circulation patterns, physical quantities and its impact on agriculture, an early warning index of forecast was put forward. The results showed that the strength of high temperature and the days of duration were historical extremes in July 2010; Long duration of hot and dry weather as well as the strong and continuous stability of the continental warm high pressure was the main reasons for the continuous high temperature process. Sustained high temperature caused a significant decline in soil moisture, doubled the river flow, and greatly affected a variety of crop production.