分析了闭环定向红外对抗技术的优势，总结了国外机载闭环定向红外对抗技术的研究进展及其发展趋势，阐述了机载闭环定向红外对抗系统的一般组成和工作原理，重点分析了宽温域高效率红外激光器技术、高精度主动跟踪技术、导引头快速准确识别技术、激光调制编码干扰技术等机载闭环定向红外对抗系统的关键技术，给出了闭环定向红外对抗系统的关键技术试验验证情况。

Analysis is made to the superiority of Close-Loop Directed Infrared Countermeasures (CL-DIRCM). The research progress and the experimental verification of foreign airborne CL-DIRCM techniques are summarized and the development trend is given. The working principle and compositions of airborne CL-DIRCM are presented, with focus on the key technologies of airborne CL-DIRCM, including wide-temperature-region, high-efficiency infrared laser technology, high-precision active tracking technology, fast and accurate seeker identification technology, and laser modulated jamming technology with optimized jamming codes. The experimental verifications of the key technologies of CL-DIRCM are given.