Die for manufacturing aluminum pipe

The utility model discloses a die for manufacturing an aluminum pipe. Characterized in that it is characterized in that it comprises, the die comprises a lower die and an upper die matched and connected with the lower die, an aluminum pipe cavity is formed in the upper die; a core rod matched with the aluminum pipe cavity in shape is arranged on the inner side of the aluminum pipe cavity; the outer side of the aluminum pipe cavity is connected with the flow dividing holes through a flow dividing bridge, a flow choking block is arranged in the lower die, the flow choking block is of a circular-ring-shaped structure, the structure of the inner side of the flow choking block is matched with the structure of the outer side of the aluminum pipe cavity, and the aluminum pipe cavity is of a circular-ring-shaped structure with a plurality of protrusions evenly distributed on the inner side. The die is internally provided with the annular flow choking block, and the flow choking block is arranged on the outer side of