In recent years, the proportion of DC transmission and renewable energy power generation has increased rapidly, and the requirement that renewable energy units should participate in the primary frequency regulation of power grid has been gradually introduced into the management rules of various localities. However, the existing evaluation methods for the primary frequency regulation performance of a renewable energy station based on simulated power grid frequency disturbance tests focus on the comprehensive evaluation of primary frequency regulation performance of the station and cannot accurately characterize its initial dynamic characteristics, which are not suitable for the analysis of field measured data. Aimed at this problem, a segmented evaluation method for the primary frequency regulation performance of the station is proposed. Based on the description of the existing evaluation methods for the primary frequency regulation performance of renewable energy stations, the shortcomings of the existing evaluation methods are revealed by combining with the analysis results of field fault recording data. Then, according to the dynamic characteristics of primary frequency regulation and the control process of primary frequency regulation of the station, the measured data is analyzed and evaluated in segments to achieve an accurate characterization of primary frequency regulation performance during the whole process. Test results show that the proposed segmented evaluation method can be effectively applied to the analysis of measured data of primary frequency regulation and accurately evaluate the primary frequency regulation performance of the station, providing an alternative scheme for the real-time evaluation of primary frequency regulation performance of renewable energy stations.