复杂背景中小目标的检测与跟踪一直是监视和告警系统的重要组成部分, 综合该领域近年来的研究成果, 从空间滤波和时间滤波的角度对现有的红外小目标检测方法进行了简单的概述, 并分析了今后的研究方向。(The detection and tracking of small and medium targets in complex background is an important part of the monitoring and warning system. A brief overview of the existing infrared small target detection methods is made from the angle of spatial filtering and time filtering, and the future research direction is analyzed.)