This paper proposes a new type self-excided DC circuit breaker（DCCB）based on superconducting current-limiting technology. The DCCB combines superconducting current-limiting module and DC interrupting module together. This paper analyzes the self-excited interrupting process of DC interrupting module

the influence of each parameter on interrupting process and feasibility of interruption principle. This paper analyzes the interrupting feasibility under different rated voltage（10

100

320 k V）. The feasibility of the DCCB is proved by analyzing commutation circuit parameters and arc parameters that effects on DC interrupting under 10 k V

DC in-terrupting process under 100 k V and coordination between current-limiting module and interrupting module under320 k V. Simulation results show that the interrupting time decreases with the increase of capacitance and arc power loss factor; and decreases with the decrease of inductance and arc time constant. It is proved that current-limiting module and interrupting module cooperate well. The proposed DCCB can achieve interrupting short-circuit current under different voltage levels.