Comparing with satellite borne MSSor TM, Airborne Multispectral Scanner (AMSS)has unique characteristics: Line-scanning rotating mirror type with large field of view, lower flying altitude and poor stability of movement and orientation of the platform. Therefore, the effects of various disturbing factors on AMSSimage are severe and geometric distortions caused by these factors in AMSSimages are more complex. Geometric correcting rot only is difficult, but also accurate and effective geometric correction cann’t be done according to imaging geometric mode of satellite borne MSSor TM. This paper quantitatively analyzes effects of various factors on geometric characteristics of AMSSimage in details, it is helpful to develop the method for correction of geometric distortions in AMSSimage.