Abstract: The high voltage DC circuit breaker is one of the most efficient fault isolation devices. A clamped single module type reciprocating high voltage DC circuit breaker topology, which has the function of current-limiting and interrupting, was proposed. The camped single submodule is the main device for fault clearing. It has higher current-limiting capacity than the inductor, and has bi-directional flow capacity compared with IGBT. The topology is able to be connected in series or in parallel through switching trans-IGBTs. It has low resistances in the normal state and high resistances in the transient state, and the topology is modularized designed. It is convenient to change the number of branches, the number of clamped single submodules and the type of submodules to adapt to different situations. A six-terminal DC grid was established in PSCAD/EMTDC and simulations were carried out to validate the proposed topology.