本文系统介绍了地铁牵引供电接触网形式的变迁和用于地铁的第三轨式接触网、刚体悬挂技术与钢铝复合轨等刚性接触网的发展,认为钢铝复合轨与刚性悬挂技术在地铁更具有良好发展潜力,虽然其一次投资费用稍高,但维护材料与人工费用少,远期效益明显。 This article systematically introduces the transition of the form of catenary traction power supply catenary and the development of rigid contact net used in the third rail contact system, rigid body suspension technology and steel-aluminum composite rail. It is considered that the steel-aluminum composite rail and the rigid suspension technology are widely used in the subway More good potential for development. Although the investment cost of a project is slightly higher, the maintenance of materials and labor costs are less, and the long-term benefits are obvious.