简要介绍了《ＡＡＲ机务标准手册Ｍ—１００１》、《苏联铁路车辆设计规范及试验方法和技术条件》及我国有关专家关于车辆通过小半径曲线计算方法上的相同与不同之处，通过几何关系和力学原理，结合我国铁路货车的结构特点，分析了铁路货车通过小半径曲线与车钩间隙的关系，并得出了六条重要结论 This paper briefly introduces the same and difference of “AAR Maintenance Standard Manual M-1001”, “Soviet railway vehicle design specifications and test methods and technical conditions” and Chinese experts on the vehicle through the small radius curve calculation method through the geometric relationship and Mechanics principle, combined with the structural characteristics of China’s railway wagons, analysis of the relationship between the railway wagon through the small radius curve and the coupler clearance, and reached six important conclusions