Abstract: In order to reduce the influence of boresight angle error on the image quality of the time delay integration charge couple device (TDICCD) space camera during the tilted imaging process, the requirements for the scopes of boresight angle and its control errors were put forward to meet the image quality of space camera. According to the imaging mechanism of space camera, the calculation formula of focal plane image motion speed and that of the matching error of image motion speed caused by boresight angle error were presented, and the effect of boresight angle on the ground pixel resolution was analyzed. Moreover,the ranges of boresight angles for different integration degrees were given under the constraints of modulation transfer function (MTF). From practical calculations, it is concluded that, when the control error of boresight angle is 0.8, the boresight angle should be less than 12.75or if the boresight angle needs to reach 25, the control error should be less than 0.4to satisfy the quality requirements of TDICCD of which the integration degree is 96.