The utility model discloses a device is salvageed fast to portable low -voltage distribution trouble, including portable low -voltage distribution cabinet, the inside of portable low -voltage distribution cabinet is equipped with an isolation knife -like switch, at least one residual current operated protec tive device, residual current operated protec tive device is connected with the isolation knife -like switch, portable low -voltage distribution cabinet is equipped with that the base is inserted in the inlet wire hot drawing, the base is inserted in the hot drawing of being qualified for the next round of competitions, the inlet wire hot drawing is inserted the base and is kept apart the knife -like switch and is connected, the hot drawing of being qualified for the next round of competitions is inserted the base and is connected with residual current operated protec tive device. The utility model discloses convenient to carry, remove quick, the operation is quick, has realized the on -the -spot quick temporary power of troubleshooting, improves and salvagees work efficiency, also realizes reducing the purpose of power failure scope simultaneously.