The temporal and spatial characteristics and change trends of glaze were analyzed by using linear trend analysis method based on the daily data in Liuzhi special zone from 1961 to 2008.The results showed that the occurrence of glaze was mainly in January and glaze days decreased gradually in recent 48 years.The most glaze days appeared from 1960's to the 1980's.The glaze days decreased significantly since 1990's.The glaze days significantly decreased with the increase of temperature in winter since 1984.