This paper analyzed the variations on different time scales of gales in the Huashan mountain scenic spot of Shaanxi， by using the hourly observations from the year of 2012 to 2017 in the Huashan’s station.Two representative southerly events were analyzed in this paper to get the mechanism of gales of Huashan.The main conclusions were as follows.Taking the wind velocity of more than 17 m·s^-1 as a thread， the gales of Huashan tended to occur from 21:00 （Beijing Time the same as affer） to the next early morning frequently， on the contrary， less gales occurred after noon and before 20:00.The southern peak located at higher altitude and more southward position， so it encountered more southerly gales.The Huashan station meet with not only southerly gale， but also northwestern strong wind， because of its northerly position and lower altitude.During the two gale southerly events， the similar circulation of characterized by ‘East High and West Low’ at the low-level was explored.Huashan was located in the contour-intensive transition region of from North China High to Northwest Low.The dynamic theory of gradient wind resulted in the high velocity.Before the gales， the 3h variable pressure field displayed a strong negative center of lower than -4 hPa in central Shaanxi， which made the convergence and ascending motion.At the same time， the southerly alee was accelerated in the night and enforces the gales， accompanied with the instability-ascending motion.The significant temperature and pressure changes were found before the strong wind.In the autumn gale， the temperature decreased by 5 °C 3 hours before the maximum velocity， accompanying the pressure decreased by 4 hPa about 7 hours before.The early changed pressure and temperature can be the important factors of wind forecasting.From the observations of Jinghe radar site， 100 km away from Huashan， the echoes in the Huashan gale were weakened and cannot display the extreme velocity， because of the terrain occlusion of high mountain peaks.