Smallscale characteristics of a low level horizontal wind shear process occurring in Qingdao Airport on 20 March 2002 are studied . The results show that the smallscale adjustment process between wind field a nd pressure field is produced by the strong wind shear. The largescale backgro und synoptic process is also investigated and it is found that a fastmoving cold front causes the strong low level wind shear process over the Qingdao Airport. Exploring the inducement of strong wind shear and making prediction of wind shear are very important for flight staff and aviation controller.