裂隙岩体的表征单元体（REV）是岩体力学中的一个基础性概念，一直是学者们关注的焦点。结合近年来的研究成果，对裂隙岩体表征单元体最新研究进展进行全面、详细地介绍，从表征单元体研究角度与参数、研究方法以及量化方法 3个主要方面进行阐述。将探讨裂隙岩体表征单元体的角度归纳为结构面及块体几何参数、岩体力学参数和水力学参数3个方面；研究方法主要包括统计学方法、解析法和数值分析法，对这些方法的研究现状进行介绍；最后对量化岩体REV尺度的常用方法进行概括总结，包括直观判断、误差及变异系数判别法、假设检验、曲线拟合法和灰关联分析。为相关研究提供一定的参考和指导。

Since the concept of representative elementary volume (REV) of fractured rock masses is fundamental and significant in rock mechanics, it is worth studying by researchers. This paper critically reviews the latest research achievements in the field of REV of fractured rock masses. Three main aspects are discussed, which are research viewpoints and its relevant parameters, research approaches and quantitative methods. Firstly, from the point view of studying REV, the geometrical parameters of discontinuities and rock blocks, the mechanical and hydraulic parameters of rock masses are investigated in detail. Secondly, the applied conditions, merits and drawbacks of research approaches are briefly introduced, including statistical, analytical and numerical methods. Finally, the quantitative methods for determination of REV, i.e., intuitive judgment, error and coefficient of variation prediction, hypothesis tests, curve fitting and grey correlation analysis, are summarized. This paper provides reference and guidance for relevant studies.