Abstract: This paper designed a private cloud performance evaluation method that met railway business requirements. By analyzing the actual business needs of the railway, the paper abstracted evaluation index, and based on open stack to build a set of experimental cloud platform for the optimization of the Beijing-Shenyang passenger dedicated experimental line, the evaluation method was applied to the experimental platform. Experiments show that the performance index of the experimental cloud platform can meet the expected objectives and the needs of railway business requirements. The evaluation method is suitable for the performance evaluation of railway private cloud. The results show that the evaluation method is feasible to apply to the railway private cloud system, and provides support for the construction and optimization of the railway private cloud platform.