Abstract: The sources affecting Bejings dust storm weather are analyzed and found out,which are mainly located in desert,desertification regions and vast agriculture reclamation areas in arid and semi-arid areas that are in the west fringe of the Hunshandake Sand in morth Beijing,in the center and west region of Inner Mongolia,and in the west He-Tao area.There are three dust transport paths that influence Beijing,i.e.west route,north route and northwest route.The climate characters are further analyzed and shown to be warm,drought and lacking precipitation,which accelerates formation of dust weather.In addition,dust sources spring precipitation and Beijings dust storm frequency are compared.There is a distinct negative correlation between Beijing’s dust storms frequency and spring precipitation at northwest route and north route dust sources,while there is a distinct negative correlation between Beijing’s floating dust frequcncy and spring precipitation at west route dust sources.