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This utility model relates to the field of power electronics technology, specifically to a DC common bus current limiting and blocking device. It includes an energy storage converter and a DC bus terminal, with a blocking module disposed between the energy storage converter and the DC bus terminal. The blocking module includes multiple blocking units, and the energy storage converter is connected to the blocking units. The blocking units are connected in parallel to each other and connected to the DC bus terminal. This DC common bus current limiting and blocking device can achieve rapid current limiting and isolation when multiple energy storage converters are connected in parallel to the DC bus. It has high response speed and dynamic detection capability, and can effectively avoid the adverse effects of abnormal current caused by faulty equipment on other equipment.