近年来，随着国际上掀起的太赫兹(Terahertz，THz)研究热，太赫兹科学技术的发展更为迅速。但是，对于THz的各种功能器件，利用基于经典电磁理论的微波技术手段或者利用基于量子理论方法的光学技术手段都遇到了很大的困难。90年代末，随着频率禁带处在THz波段的光子晶体(Photonic crystal，PC)制作方法和技术的提高，基于光子晶体的THz器件应运而生。为此，就国际上在光子晶体THz滤波器，光子晶体THz波导，光子晶体THz光纤和光子晶体THz谐振腔方面所做的主要工作和研究成果进行了较详细的论述分析及归纳总结，并对光子晶体THz器件未来的发展提出了几点看法。

Recent years,much attention has been paid on Terahertz and a fast development on terahertz science and technology has been achieved. However,there is much difficulty to fabricate terahertz devices with classical electromagnetic microwave technology or optical means based on quantum mechanics. In the later nineties,with the improvement of manufacture method on photonic crystal in terahertz band gap,terahertz devices based on photonic crystal emerged. Therefore,an overview on photonic crystal terahertz devices,such as photonic crystal Terahertz filter,photonic crystal Terahertz waveguide,photonic crystal Terahertz fiber and photonic crystal Terahertz cavity is presented and analyzed,and some suggestible perspectives are also given in the end.