The invention relates to the field of production and manufacturing of a high-temperature and high-pressure elbow for a boiler and mainly solves the problems that a seamless steel tube as a raw material of the elbow is long in purchasing cycle and limited by wall thickness and a forging short tube is high in cost and low in utilization rate and cannot meet demands of production and marketing. Withthe adoption of the production method, the hot rolled seamless steel tube or the forging short tube is needlessly utilized as the raw material, a hot-pressing or pushing procedure is omitted, a blankis subjected to one-time forming in a shape follow-up cavity by the aid of a forging press and a combined shape follow-up clamping fixture, and after appropriate heat treatment, machinery adding and nondestructive testing in later period, a required high-quality elbow product is obtained. The method not only can be applied to manufacture of the elbow in the industry of the high-temperature and high-pressure boiler, but also can be popularized to manufacture of other pipe fittings and forge pieces in the forging industry.