In this study,the meteorological data of surface observations at Huangshan station during 40-years (1956-1995) were used to analyze the features of cloud deck .The relation between cloud deck and temperature,humidity, and wind was given.The analyzed results show that the average number of cloud deck day was 223.85/year,which varied a lot among years,the annual amount of cloud deck day has quasi-twelve years cycle.The correlation coefficient between sequence dekad-to-dekad mean cloud deck day of cloudiness ≥80 %(50 %) and sequence dekad-to-dekad mean temperature is－0.89(－0.83),and sequence dekad-to-dekad mean humidity is－0.69(－0.61). Ｐrecipitation often appears in the day of cloud deck or the day before. More than 80 % cloud deck is related with west northwest wind (not including June),average wind velocity is ＜10.4 m/s. Appearance of cloud deck in Huangshan is associated with atmospheric circulation.