It’s of great significance to establish 1500 V DC switchgear (DCS) status evaluation model for the safe operation of the subway. According to the operation principle of 1500 V DCS and the indexes in its operation process, using circuit breaker information mainly, and combining with the information of accessories and cabinets, this paper establishes a status evaluation index system of 1500V DCS, which is used to make a comprehensive assessment of the function for DCS. The entropy-catastrophe progression based status evaluation algorithm replaces the subjective weight with information entropy, which avoids the interference of the subjective factors in the evaluation process and makes the equipment information more directly influence the evaluation process. It conducts index fuzzification according to the cloud model and fully considers the randomness and fuzziness of indexes. The status evaluation model also fully considers various factors that affect the operation status of DCS. The information entropy can objectively reflect the actual status of DCS, and a reasonable evaluation is given in the absence of indexes. A case study is given to validate the effectiveness and feasibility of the proposed algorithm by using the actual operation data of DCS. This work is supported by National Natural Science Foundation of China (No. 51477055 and No. 51777078) and Science and Technology Project of China Southern Power Grid (No. [2015]000303ZB00002).