For sweeping aerial remote sensor using linear array time delay integration charge-coupled device (TDI-CCD) as an imaging detector, the moving target imaging, integral time, flight and TDI scan two-dimensional space all suffer from streaking phenomenon. This reduces the sensing system modulation transfer function (MTF), and leads to the decrease of the image resolution. For the above phenomenon, we analyze the causes of image smear and establish a mathematical model for the quantitative analysis of the influence of image smear on the MTF. Mapping of the image smear to the image resolution is then founded through the relation between MTF and image resolution. Active compensation is performed on the image smear. Flight environment is simulated by use of dynamic target generator, parallel light pipe and three-axis turntable, through which the theoretical analysis results are verified experimentally. The experimental results show that when the control accuracy in a theoretically allowable error range, image smear phenomenon can be compansated and image resolution can be improved obviously.