Dynamic metro detection industry is developing rapidly in our country. As an important item to detect the state of the pantograph-catenary relationship, threshold management is often adopted in dynamic catenary detection to identify the abnormal parameters of the local catenary and the status of the pantograph-catenary relationship, and to check, rectify, and eliminate hidden dangers. In order to comprehensively evaluate the rigid catenary in the metro industry and overcome the deficiencies of traditional methods in quantifying the overall quality of the catenary, the static parameters of the catenary are calculated using the standard deviation, and the dynamic parameters of the pantograph and catenary are calculated by the Topsis evaluation method. This method gives full play to the role of the dynamic and static detection data of each catenaryand the quality of the rigid catenary is evaluated in an all-round way. According to the daily operation test data of Zhengzhou Metro and referring to the TQI evaluation system of the track quality index, a CQI (Rigid Catenary Quality Index) evaluation system of the rigid catenary quality index is established to evaluate the quality status of the rigid catenary in sections. This study has significance for the management of infrastructure facilities and the rational allocation of maintenance resources to achieve condition-based maintenance.