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列车质量与速度是影响运输能力与成本的重要因素，其优化选配对快速与高速列车尤为重要。本文在分析与比较提速列车质量计算的原则和方式方法以及相关的选择判别值的基础上，提出应从传统的侧重列车质量的方式转向侧重运行速度的方式，并最终确立第二临界坡度为推荐的最高速度（保有加速度）法与传统的计算速度法的选择判别值。文章最后通过具体提速客货列车质量的计算与分析，说明实际操作与应用。作者提出的列车质量计算的原则和方法也适用于高速列车。
The quality and speed of trains are the important factors affecting the transportation capacity and cost. The optimization and matching of trains is particularly important for fast and high-speed trains. Based on the analysis and comparison of the principle and method of speed calculation of train speed and the related discriminant value, this paper proposes that the traditional train-oriented train quality should be shifted to focusing on the running speed and finally the second critical gradient should be established as recommended Selection of the maximum speed (hold acceleration) method and the traditional calculation speed method. Finally, the article calculates and analyzes the quality of passenger and freight trains at specific speeds to illustrate the actual operation and application. The authors proposed principles and methods of calculating train mass also apply to high-speed trains.