Abstract: To tackle the issues of costly and unselective reclosing of hybrid DC circuit breakers in flexible DC grids, this paper proposes a multi-port hybrid DC circuit breaker with adaptive reclosing capability. The proposed circuit breaker can bypass the current-limiting reactor in the fault line during energy dissipation, working with the capacitor charging circuit. The circuit breaker transfers the energy, which is initially meant for dissipation through the arrester, to the capacitor. This effectively reduces the fault isolation time and the energy dissipation pressure on the arrester, while also providing energy support for fault nature identification. Moreover, this circuit breaker achieves fault isolation by sharing the main circuit breaker. Combined with the reduction in energy discharge requirements of the arrester, the manufacturing cost can be greatly reduced, having obvious economic advantages. Additionally, the circuit breaker utilizes the amplitude difference in fault identification current and capacitor voltage between permanent and transient faults to identify the fault nature, enabling adaptive reclosing, thus making it simple and easy to control. Finally, the effectiveness of the proposed scheme is simulated and verified using PSCAD/EMTDC in the environment of a three-terminal flexible DC system, and its superiority is proved through comparative analysis with other schemes.