Based on the operational characteristics of the Jilin power grid, this study analyzes its load patterns and current peak-shaving situation. By evaluating the system’s peak-shaving capacity and demand, including the participation of pumped storage power stations, an assessment of the peak-shaving balance during 2023–2024 is conducted. Results indicate a continuous widening of the load peak-valley variation, while the growing integration of renewable energy intensifies peak-shaving pressure. To address these challenges, comprehensive measures are recommended, such as strengthening demand-side management, improving auxiliary service mechanisms, promoting heat-power decoupling technological upgrades, and accelerating the development of pumped storage. These efforts aim to enhance the system’s peak-shaving margin and operational security.