The practice, as a motive force, is the basic reason of formation and development of Physics of Blown Sand (PBS). At present, the main contents of PBS include the following : Graund wind erosion, wind-sand action, wind formed landforms, and prevention and cure engerneering of wind-sand. The process of formation and development of PBS is detailed in this paper, the key problems in PBS study are pointed out clearly, and the study tendency and field in the future are evaluated.PBS study in China is launched later, the main important results are gotten after 1977. At present , PBS study in China occupies an important place in that of world study, Chinese scientists hold a safe lead in many fields, such as wind-sand action, prevention and cure engerneering of wind-sand. PBS is a very applied subject. Because of the large area of desert and sand-land in China, the tendency of natural resources exploitation and economy construction is moved to north - west and north China in the future. There is a suggestion that Chinese PBS study is strengthened.