Abstract: Based on the crop growth stages and climate data of seven meteorological stations from 1981 to 2004 in Henan Province, the climate change and its impacts on main growing stages of winter wheat and summer corn were analyzed. The results showed that the growing stage from reviving to maturity stage of winter wheat became earlier and the postponed tendency of the jointing stage was the most obvious. The whole growing period of winter wheat had been reduced by 1.3 day per ten years.The main reasons caused the shorter growing period were that the average temperature increased from February to May and the sunshine hour reduced in March. All growing stages of summer corn were postponed and the postponed tendency of the maturity stage was the most obvious. The reduced total precipitation from Jun to September led to a postponed tendency of growing period of summer corn. Therefore, the whole growth period of summer corn had been increased by 2.1 day per ten years.

Key words: Climate change, Climate change, Winter wheat, Summer corn, Growing period, Impact