Positioning device for cold rolling of metal pipe

The utility model discloses a positioning device for cold rolling of metal pipes, which comprises a main body component, a cold pilger mill, a support rod and a core rod body, the support rod is positioned in the cold pilger mill, and the core rod body is arranged at one end of the support rod; the positioning assembly is arranged in the supporting rod and comprises an ejection piece, a positioning piece and a fixing piece, a mounting hole is formed in one end of the supporting rod, a placement hole is formed in the mounting hole, the ejection piece is located in the placement hole, a placement groove is formed in one side of the core rod body, the positioning piece is arranged in the placement groove, and the fixing piece is located in the placement groove. And the fixing piece is positioned in the mounting hole. The utility model has the beneficial effects that the main body assembly is used for processing a metal pipe, and the positioning assembly is arranged, so that the core rod and the connecting rod ca