Abstract: Based on the ground meteorological elements of January and February,2008,interim daily reanalysis data and DEM data,this paper has explored the causes of frontogenesis,frontolysis and movement of Kunming Quasi-Stationary Front in early 2008 from three aspects,namely,circulation situation,weather system and frontogenesis function.The results indicate that the movements of front are related to the strength of cold and warm air; the strength of east wind,intensity and location of south westerly trough,subtropical high and configurations among weather systems.At the beginning of frontogenesis,change of wind filed is more rapid than that of temperature filed,and the strength and thickness of east wind can indicate the strength and thickness of cold air. Frontogenetical area is about 2—3 longitudes,which can be seen as the width of front.When the whole frontogenetical area moves to the west of 104°E,the font can climb to the western Yunnan-Guizhou Plateau,and frontogenetical area is above 700 hPa when front moving westward.Divergence term is of predictable significance to frontogenesis and movement. Wind shear is important to horizontal deformation term,and vertical motion tilting term makes a difference to frontolysis,non-adiabatic heating term to frontogenesis,frontolysis and movement of front.