During the imaging process of space camera with large field of view, longitudes and latitudes of objects on earth corresponding to different field of view positions differ from each other. As a result magnitudes and directions of image motion speeds caused by rotation of the earth are different. As the earth is actually an ellipsoid, distances between objects on earth and the projection center change along with field of view position and geocentric angle from ascending node to subastral point. Therefore image motion speed caused by orbital motion of the satellite varies. Formulas for calculation of image motion speed and drift angle at different field of view positions using earth ellipsoid are deduced based on analyzing imaging principle of space camera with large field of view. Influences of adjusting row transfer periods uniformly and separately and drift angles of a space camera with large field of view on imaging quality are analyzed. Results of experiments and analysis indicate that using no more than 5% reduction of modulation transfer function (MTF) as a constraint condition, row transfer periods can be adjusted uniformly if no more than 8 time delay intergration (TDI) stages are used. Otherwise row transfer period of each CCD chip should be adjusted individually. If 16 TDI stages are used, reduction rate of along-orbit MTF should be cut down from 17.33% to 0.53% as row transfer period of each CCD chip is adjusted individually.