The invention discloses a pipeline surface pit repair tool. The pipeline surface pit repair tool comprises a tapered lead screw and an annular tapping head; the annular tapping head is a section of cylinder with a cylindrical outer surface; a tapered threaded hole is formed in the center of the inner cavity of the cylinder in the axis of the cylinder; the cylinder is formed by a plurality of pieces opposite hooped together; the cylinder is divided into a plurality of pieces in the direction of the axis; the plurality of pieces of the cylinder are peripherally bundled up by use of an elastomer; the tapered lead screw is matched with the threaded hole of the inner cavity of the annular tapping head. The pipeline surface pit repair tool is portable, environment-friendly, easy to carry and convenient to operate. The tool is capable of repairing the pit parts of a stainless steel pipe, an aluminum pipe and a copper pipe in short time; the problems of need on oxy-acetylene flame for heating the metal pipelines, time and labor waste, difficult repair and the like are solved; in short, the pipeline surface pit repair tool has wide popularization and prospect and practical use significance.