介绍了日本铁道综合技术研究所在开发21世纪高速新干线用转向架方面所做的工作。对原新干线用无摇枕转向架在结构上进行了两种方案的改进，一是加长转向架轴距，合理选择转向架主要参数；二是把牵引电动机和圆盘制动装置悬挂在车体上，减轻转向架簧间、簧下质量，两种方案都可使动车的高速运行的稳定性和乘坐舒适性得到大幅度提高。文中介绍了两种转向架的结构特点和试验台试验结果。 Introduced the work done by the Japan Railway Institute of Integrated Technology in developing the bogie for the 21st century high-speed Shinkansen. On the original Shinkansen without bolster bogie in the structure of the two programs to improve the first one to extend the bogie wheelbase, a reasonable choice of the main parameters of the bogie; the second is the traction motor and disc brake hanging in the car Body, to reduce the bogie spring, unsprung mass, two programs can make the car’s high-speed operation of the stability and ride comfort has been greatly improved. The paper introduces the structural characteristics of the two bogies and test bench test results.