在CCD星敏感器中,快速而可靠的星图识别算法成为星敏感器确定姿态的最关键部分。针对星图识别误匹配的存在,通过实验数据探讨了采用不同的星图识别特征、增加参与星图识别的恒星数目、提高恒星位置测量精度和星等测量精度、使用不同的星图匹配门限、选取合适导航星等方法,提高星图识别正确率。实验结果表明,采用这些方法后,星图正确匹配概率大大提高。 In the CCD star sensor, a fast and reliable algorithm for star image recognition becomes the most crucial part of the star sensor’s attitude determination. Aiming at the existence of mismatch of star chart recognition, this paper discusses the use of different star chart recognition features, increases the number of stars involved in star chart recognition, and improves the star position measurement accuracy and satellites measurement accuracy by using experimental data. Different star matching thresholds are used, Select the appropriate method of navigation star, to improve the accuracy of star map recognition. The experimental results show that using these methods, the probability of correctly matching the star chart is greatly improved.