Abstract: To address the difficulties in implementing conventional non-outage operations within the complex working environments of distribution networks in aging urban areas, this paper proposes an innovative strategy integrating advanced technologies and equipment. A comprehensive non-outage maintenance model is established based on the combination of live-line work, bypass systems, and mobile power supply. Through the innovative integration and application of equipment such as tracked insulated aerial devices, narrow self-propelled insulated platforms, and low-voltage synchronous grid-connection devices, spatial and terrain constraints are effectively overcome, enabling efficient and flexible operations in complex scenarios. Taking the line renovation project in Beijing’s main urban area as a case study, the proposed model was validated through coordinated use of bypass systems, power generation vehicle transfers, and live-line operations. The results demonstrate its significant advantages in reducing customer-hours of outage, improving power supply reliability, and adapting to the complex environment of old urban districts. The research outcomes provide a scalable and replicable "zero-outage perception" technical pathway for the upgrading and transformation of distribution networks in urban core areas and aging districts nationwide.