Abstract: High voltage DC grid has advantages in renewable energy transmission and regional AC grid interconnection, but DC peak fault current will rise with more terminals and larger transmission capacity. Therefore, the requirement for DC circuit breakers (DCCB) has increased. The conventional method only used faulty line DCCB to isolate fault, while this paper focused on the coordinated control of DCCBs. As several adjacent DCCBs are tripped to help the faulty line DCCB, the stress on faulty line DCCB is shared. Moreover, a novel current limiting method of DCCB is proposed for the adjacent DCCBs application, which could reduce system fluctuation during fault. The primary/backup protection, and reclosing logic of DCCBs are studied in the Zhangbei project. Simulation shows that the energy dissipation of faulty line DCCB is reduced by 18.8%~25.2%, and the system recovery time is reduced by 36%~44.8%.