Abstract: Traditional secondary cabinets can no longer meet the rapidly growing demands for intelligent construction in terms of cabinet manufacturing, equipment commissioning, and on-site modification and installation. To meet the intelligent development requirements of secondary equipment in power systems, a new type of secondary cabinet suitable for digital production, automated commissioning, rapid on-site installation and commissioning, and modification is urgently needed. Through research on modular terminal-block-free secondary cabinets, a novel modular terminal-block-free secondary equipment cabinet is developed. It effectively improves the efficiency of production, commissioning, and on-site modification and provides significant support for future substation construction.