太赫兹（THz）波是频率范围在0.1~10 THz的电磁波，具有低能性、宽带性、指纹光谱、对水敏感等特点。随着太赫兹技术的发展，太赫兹成像技术在生物医学诊断、无损检测和安检等领域表现出许多独特的优点，得到了越来越广泛的关注。主要概述目前常用的太赫兹成像技术，详细介绍脉冲太赫兹成像技术、连续太赫兹成像技术、太赫兹近场成像技术及太赫兹实时成像技术的发展现状，并介绍太赫兹成像技术在安全检查、无损检测和生物医学领域的典型应用，最后对太赫兹成像技术的未来发展进行展望。

Terahertz (THz) wave is electromagnetic wave in the frequency range of 0.1?10 THz, which has the characteristics of low energy, broadband, fingerprint spectrum, and sensitivity for water. With the development of THz technology, THz imaging technology has shown many unique advantages in the fields of biomedical diagnosis, nondestructive testing, and security inspection, and has gained more and more widespread attention. This paper mainly overviews the common THz imaging techniques. The imaging principles and research progresses of pulsed THz imaging technology, continuous THz imaging technology, THz near-field imaging technology, and THz real-time imaging technology are introduced in detail, respectively. The typical applications of THz imaging technology in the fields of security inspection, nondestructive testing, and biomedicine are also introduced. Furthermore, the future development of THz imaging technology is prospected.