Abstract: By utilizing temperature data from the surface to the 20 hPa level for 1961～1994, statistics was conducted inorder to underst anding an seasonal variation, a vertical profile and a long-term trend. The results indicate that, the climatic features of up-levels and down-levels delimting with the 150 hPa levels are different, e. g., the yearly range of temperature is positive, at down-levels lower than the 150 hPa but negative at up-levels higher than that. In last 30 years, the temperature in the lower troposphere in-creased significantly, oppositively, the temperature in both the higher troposphere and the strat osphere decreased. It leads the vertical lapse of tem perature in the troposphere has enhanced.