A brief introduces of some experiments about using UV-preionized TEA CO2 laser pushed parabolic lightcraft is given. Using PIN to probe the intensity variations of a He-Ne laser, the information of the air disturbance due to the laser interact with the ligtcraft was obtained. The experiment showed that the focus of the parabolic lightcraft could influence the air-disturbance outside lightcraft. Two shock waves were detected for longer focus, but only one shock waves was detected for short focus, air-disturbance could be detected after 5 millisecond of laser pulse when single pulse with 32 J energy interacted with short focus lightcraft. Using monochromator detecting the spectrum of the plasma, the time evolvement process of line spectrum of the plasma has been analysised.