Abstract: This paper studies airborne imaging ladar with unit detector to analyze the effects of the airborne movement on laser scanning imaging of ground target.In this paper, the imaging ladar system model is founded and the mapping transrormation relalionship of ladar scanning imaging are explained. The mathematic relations among imaged earthbased target and moveing airborne and Ladar are established.The distortion mechanism and factor are analysed.At last the method of time series level by level amending is deduce.