太赫兹(THz)波以其光谱和传输性能等方面的独特特性在基础学科研究、医学成像和无损检测等多领域具有重要的应用前景，其科学研究战略意义重大。根据THz 波参量振荡器(TPO)的结构，主要从产生THz 波常用的非线性晶体，内腔、外腔及腔增强结构，THz 波输出耦合方式，浅表面输出结构，抽运光参数对TPO 的影响和种子注入技术几个方面对国内外THz 参量振荡器的研究进展进行回顾。随着新材料和新结构的研究，TPO 将会在越来越多的领域中发挥作用。

Terahertz (THz)-wave has brought huge application prospect to the study of basic disciplines, medical imaging and nondestructive testing, for its unique features in spectrum and transmission performance, and it has significant scientific strategic importance. The development process of THz-wave parametric oscillator (TPO) is mainly summarized from several aspects: nonlinear crystals used in THz generation, resonator structures including external cavity, intra-cavity and pump-enhanced cavity, THz wave output coupling schemes, surface-emitted structure, pump light parameters and injection seeding. With the development of new materials and new structures, TPO will play an important role in more fields.