Abstract: By analyzing the change of mean air temperature and precipitation from 1959 to 2007 in Mosuowan district.The results showed that the air temperature increased obviously in past 48 years,especially in recent 10 years.The mean air temperature in 4 seasons increased,especially in autumn and winter.The annual precipitation also increased obviously from 1990s to the beginning of this century.The mean precipitation of last decade was 24.98% more than that of last 30 years(1971-2000).In 4 seasons,summer had the most precipitation,following spring and winter.Further analysis showed the change frost-free duration,accumulated temperature of 0℃,10℃,15℃ and 20℃.The results could provide evidences for making use of agricultural climatic resources reasonably,making scientific agricultural development plan and guiding the agricultural production in the district.

Key words: Mosuowan, Climatic change, First frost date and latest frost date, Frostless season, Accumulated temperature