In view of practical projects, this paper analyzed the influence of the precision of row frequency on the image quality of a TDICCD camera systematically by taking scroll imaging for an example. Firstly, the expression of the image motion of each pixel was deduced when the camera was scroll imaging, and the relationship between scroll angle and image motion velocity was established. Based on this, the Modulation Transfer Function(MTF) was used to evaluate the image quality. The influence of image motion mismatching on the MTF was analyzed in detail, and the dependence of image quality on the precision of row frequency was calculated. The results show that the bigger the scroll angle and the integral number of TDICCD are, the higher the precision of required row frequency is. Contrarily, the precision of row frequency is not required strictly. In engineering application(the scroll angle is 35°), when the integral numbers of the camera are 64 and 96, the precision of row frequency should be no less than 0.54% and 0.36% respectively for MTFmatch≥0.95, which meets the need of the system. Comparing the experimental results with the calculation analysis, it is proved that the analyzed results are correct and can provide the useful references for engineering application and designing.