中文摘要：

主要介绍了直线运动单元的发展现状,总结了直线运动单元的特点,包括导轨类型、传动机构的特点。研究了单元的模块化设计和支撑线体技术,分析了单元的应用领域及发展趋势。

英文摘要：

The principle and structure of linear motion unit was introduced in this paper .The characteristics of units which include rail and driving mechanism were summarized .The modular design technology and support line technology of unit were described .The present status and developing trend of unit were elaborated ,and the applications in the industrial were presented .