Abstract: For evaluating quantitative effect of meteorological factors to crop yield, the climatic suitability model of winter wheat during growing season in Hebei province was established, based on the daily climatic data and statistics methods, and the temporalspatial changing characteristics of the climatic suitability was analyzed. The results showed that the precipitation suitability degree was obviously lower than that of sunshine and temperature, but the coefficient of variation of precipitation suitability was the largest. The sunshine suitability during the tillering period was the lowest and the coefficient of variation was the largest, the precipitation suitability during the period from jointing to heading was the lowest and the coefficient of the variation was the largest, the temperature suitability during the period from overwintering to double ridge was the lowest, the coefficient of the variation of tillering stage was the largest. The area with highvalue of temperature suitability degree was in Northwest, while the lowvalue area was in Southeast. The area with highvalue of precipitation suitability degree was in Northeast, while the lowvalue area was in Southeast. The area with highvalue of sunshine suitability degree was in North, while the lowvalue area was in South. The climatic suitability showed that, from 1981 to 2010, the sunshine suitability degree of winter wheat growing period decreased obviously, climate suitability degree decreased slowly, and temperature and precipitation suitability no changed. The main reason to climate suitability decreasing was temperature suitability decreasing during overwintering period and grain filling period, and the sunshine suitability decreasing during each development stage.

Key words: font-family: "Times New Roman", mso-bidi-font-size: 12.0pt, mso-hansi-font-family: 宋体, mso-bidi-font-family: 宋体, mso-font-kerning: 1.0pt, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA, mso-fareast-font-family: 宋体">Winter wheat, Climatic suitability, Hebei province