1. A method for optimizing flight speed of a remotely-sensed scan imaging platform, characterized in that it includes the following steps: Step 1: Selecting reference points: selecting point A and point B on the ground as reference points, wherein the distance between point A and point B is L AB km; selecting the central point of the connecting line of point A and point B as a reference point C; selecting point D as another reference point to make the connecting line CD of point D and point C perpendicular to the connecting line AB of point A and point B, and the distance between point D and point C be L CD km; Step 2: Obtaining a remotely-sensed scan image in a reference point region, and processing data; Step 3: Optimizing the flight speed of the remotely-sensed scan imaging platform.