The daily 0.25* 0.25 degree gridded meteorological data under A1B climate scenario(1951-2100) extracted from the regional climate model RegCM3 was interpolated to station location by bilinear interpolation, daily meteorological data of 83 stations from 1971 to 2000 in Huang-Huai-Hai winter wheat region was used to correct scenario data, which was divided into five periods(1951-1980, 1981-2010, 2011-2040, 2041-2070, 2071-2100) to calculate precipitation suitability for winter wheat in different growth periods and to analyze its spatial and temporal variations. The results showed that under warm and humid climate scenarios, the mean precipitation and precipitation suitability of main growth periods was better in the south than that of in the north. The precipitation was insufficient from turning green to jointing stage and ample from heading to maturity stage, the precipitation suitability was higher from turning green to jointing stage and from heading to maturity stage and lower from jointing to heading stage. Both precipitation and precipitation suitability fluctuated in positive phase with time, the precipitation suitability increased with the precipitation increasing. Both precipitation and precipitation suitability showed an increasing trend in the north while decreasing in the south from turning green to jointing stage, a fluctuating trend of decreasing-increasing-decreasing-increasing from jointing to heading stage, a relative steady trend after decreasing from heading to maturity stage. Winter wheat planting area should be expanded slightly in the northern Huang-Huai-Hai winter wheat region and keep the current state or be reduced slightly in the southern Huang-Huai-Hai winter wheat region in the future considering the impact of global warming.