The utility model discloses a two-end metallurgy mechanical double-metal composite bent pipe. A bending section is formed in the middle of a matrix bent pipe; two ends of the bending section are connected integrally and are provided with straight pipe sections; a liner bent pipe is arranged in the matrix bent pipe; the distance between the end part of the liner bent pipe and the end part of the matrix bent pipe on the same side as the liner bent pipe is 10 to 50mm; and the two ends of the liner bent pipe and the two ends of the matrix bent pipe are welded and accumulated to form a metallurgical bonding layer. The double-metal composite bent pipe with the structure has a high mechanical property of the matrix bent pipe and excellent corrosion resistance of a liner material, and the defect of low corrosion resistance or high price in the existence of a single metal bent pipe is overcome, so that the double-metal composite bent pipe has the advantages of high intensity, high corrosion resistance, long service life, low production cost of products and the like and can be popularized and applied to the technical fields of petroleum, chemical industries and the like.