Abstract: Maize is an important crop in Liaoning province with the largest planting area and highest yield comparing to the other grain crops.Studies of regularity and risk on maize cold damage and frost damage are of vital importance for defending the disasters related to temperature and insuring the maize production security.Based on the daily temperature, the minimum temperature, maize planting area, maize yield at 49 weather stations of Liaoning province, the evaluation indexes and its value of maize cool damage and frost damage were determined.Then the integrated analysis of maize cold damage and frost damage was conducted from the respect of disaster hazard, disaster exposure and disaster sensitivity.Finally, the risk assessment and regionalization of cold damage and frost damage were investigated.The results show that the high-risk region of maize cold damage is located in Xifeng and east of Changtu.The middle-risk region is in the north and east of Liaoning province and the other places are attributed to low-risk region.For maize frost damage, the high-risk region is located in Jianping, Xifeng, Qingyuan and Xinbin, while low-risk region is in coastal areas and south of Liaoning province.In conclusion, under the background of climate warming, the more attention is still required on maize cold damage and frost damage.

Key words: Maize, Cold damage, Frost damage, Risk regionalization