The invention provides a cold bending manufacturing method for a large-diameter steel pipe. By means of the cold bending manufacturing method, the defects and problems of labor and time consuming anddifficultly in precision control by flame bending are overcome and solved, and the problems of precision control on bending forming of the large-diameter steel pipe and the like are effectively solved. By means of the cold bending manufacturing method, a steel pipe with fixed curvature, steel pipes with variable curvature, and planar or irregular circular steel pipes can be bent; before pipe bending is carried out by adopting the cold bending manufacturing method, with the full utilization of computer-aided software, coordinate values of bending control points equally spaced at a certain axisare given through plane or space lofting, so as to control pipe bending manufacturing and forming; and by adopting the cold bending manufacturing method for bending the steel pipe, the equipment investment is little, the operation is convenient, the quality is good, the working efficiency is high, and the economic benefits, safety benefits and social benefits are obvious.