基于参量振荡技术的太赫兹波源是得到可调谐太赫兹波的重要器件，它在安全检查、生物传感、医学诊断、半导体器件检测和质量控制等领域具有重要的应用。从非线性晶体材料特性、谐振腔结构、太赫兹波耦合输出方式、频率调谐方式和线宽控制方法等方面总结了国内外太赫兹参量振荡技术的实验与理论研究情况。对级联太赫兹波参量振荡过程在连续、脉冲和超短脉冲运转方式的研究现状进行了回顾。基于太赫兹参量振荡技术研究现状提出其未来的一些研究方向。随着光纤激光器等技术的发展和周期性极化晶体等材料性能的进一步提高，太赫兹参量振荡器将朝着更加高效化、小型化、实用化、易于操作携带的方向发展，并在其应用领域发挥越来越重要的作用。

Terahertz source based on parametric oscillator is an important tunable terahertz device. It has important applications in the security check, biosensors, medical diagnostics, testing and quality control of semiconductor devices. This article summarizes the experimental and theoretical research of domestic and foreign terahertz parametric oscillator in terms of the material properties of the nonlinear crystal, resonator structure, terahertz output coupler, frequency tuning mode and linewidth control. We review the cascaded terahertz parametric process in continuous, pulse, ultrashort pulse operating styles and propose some of its future research directions. With the development of fiber laser technology and periodically poled crystals to further improve the performance, the terahertz parametric oscillator will move to the direction of more efficient, small, practical, portable and easy to operate, and play an increasingly important role in its application fields.