The invention relates to a dynamic electrode arc extinguishing device which belongs to the field of electricity, and particularly relates to a dynamic electrode arc extinguishing device suitable for performing arc extinguishing on dynamic electrodes. The dynamic electrode arc extinguishing device comprises a first electrode, a second electrode and an electronic arc extinguishing device, wherein the first electrode is connected with the second electrode through the electronic arc extinguishing device; the first electrode and the second electrode are connected with a third electrode; the first electrode and the third electrode form a series loop with the load to be controlled; and the electronic arc extinguishing device is used to perform arc extinguishing when the first electrode is separated from the third electrode. According to the dynamic electrode arc extinguishing device disclosed by the invention, the problem of large electric arcs of the dynamic electrodes can be solved.