The utility model discloses a direct current charger switches trip -out protection circuit, including two at least direct current charger, right change over switch that two at least direct current charger go on switching, with the two at least relays that two at least direct current charger correspond, two at least direct current charger's charging loops one end connects corresponding alternatingcurrent respectively, and the other end connects direct current, each respectively two output nodes of switch tripping operation signal and the relay coil who corresponds concatenate on tripping circuit among direct current charger's the control circuit, the relay is delay relay. With prior art, the utility model discloses when direct current charger switched, delay relay can not break off at once, when control circuit output switch tripping operation signal, triggered the tripping operation action with the time delay promptly to avoid owing to K4 relay among the control circuit loses magnetism prior to the K1 relay and leads to sending the problem of switch tripping operation signal, spurious triggering tripping operation action.