The invention provides an intelligent substation secondary equipment factory intelligent maintenance system comprising a virtual simulation module which is used for providing SCD visualization, virtual-to-real simulation test, virtual-to-virtual simulation test, configuration file management and control, protection information monitoring and auxiliary safety measure functions; the automatic test module is used for automatic test report generation, automatic test result output, automatic test data display, experimental process control, test template generation and engineering parameter generation; the full-station simulation module is used for generating a simulation test report, outputting a simulation test result, carrying out experiment control, carrying out simulation operation, setting test parameters and carrying out substation modeling; the communication analysis module is used for abnormal alarm, parameter setting, MMSClient, MMSServer, message analysis and communication monitoring; and the public service part is used for realizing data sharing and high integration of the system. Operation and maintenance efficiency can be improved, power grid operation efficiency and reliability are improved, debugging and testing efficiency is improved, and remote synchronous visualization of field testing is achieved.