Provided is a tool used for repairing a steel ladle pocket block. The tool comprises a bracket, a supporting rod, a cross rod and a working rod, and the supporting rod is supported on the bracket. One end of the cross rod is rotationally installed on the supporting rod through a bearing, and a positioning piece is fixed to the other end of the cross rod. The working rod is arranged inside a through groove in a sliding mode, and a steel wire rope is connected to the top end of the working rod so that the working rod can be hung inside the through groove through the steel wire rope. The steel wire rope is supported on the bracket by being matched with pulleys installed on the bracket. The end, away from the working rod, of the steel wire rope is connected to a stirring coil in order that the high-low position of the working rod can be controlled by winding the steel wire rope through the stirring coil. A repairing head is fixed to the end, away from the steel wire rope, of the working rod. According to the tool used for repairing the steel ladle pocket block, the application range is wide, the tool can be used for hot repairing of porous pocket blocks, nozzle pocket blocks and the like, advance retirement of a steel ladle is avoided, the service life of the steel ladle is prolonged, and the steelmaking cost is reduced.