Abstract: Crop varieties distribution need to be re-adjusted in Jiamusi city because of climate warming.In order to avoiding the variety introduction blindness from Jilin and Liaoning,low temperature controlling experiment for three maize breeds(the early maturing variety Longdan No.13 of Heilongjiang province,the middle-late season variety Yuandan No.29 of Jilin province and the late variety Danyu No.39 of Liaoning province) were carried out in Jiamusi in 2007.The results showed that Longdan No.13 and Yuandan No.29 achieved a good results and high output in Jiamusi.Danyu No.39 had high moisture content which was impossible ripe if it met low temperature years,so it was not suitable to plant in Jiamusi region.

Key words: Jiamusi city, Maize, Low temperature controlling