随着下肢截肢患者的增多以及微电子、控制等技术的不断发展，智能下肢假肢逐渐成为康复机器人领域的研究热点。作为下肢假肢系统的核心部件，高性能的膝关节假肢设计仍然是当前假肢设计中的主要技术难点。本文介绍国内外智能膝关节假肢的发展历程及研究现状，从结构设计的角度对现有膝关节假肢进行分类，分析当前膝关节假肢设计中存在的问题，最后探讨膝关节假肢的发展趋势。

Intelligent prosthesis is going to be a research focus recently with the increment of the transfemoral amputees and the development of microelectronic technology, control technology and so on. As the fundamental part of the lower extremity prosthetics, the knee prostheses with high performance is still hard to design. This paper reviewed the development of the intelligent knee prostheses, classified the current available prostheses in the term of construction design, and discussed the drawback of their design and the trend of the further development.