Forming die of pump body runner

The utility model discloses a forming die of a pump body runner, which relates to the field of pump body processing, and comprises a primary forming die, a secondary forming die and a secondary forming die, the primary forming die comprises a male die and a female die, a to-be-formed material sheet is fixed on the female die, a first cavity is arranged in the female die, and when the male die and the female die are closed, the to-be-formed material sheet is primarily formed into a U-shaped blank in the first cavity; the final forming die comprises an upper die and a lower die plate, fixed sliding blocks are installed on the two sides of the lower die plate, a movable sliding block is arranged on the side wall of each fixed sliding block in a sliding mode, the bottoms of the movable sliding blocks are supported on the lower die plate in a sliding mode, and the movable sliding blocks are connected through horizontal springs. An auxiliary forming mold core is arranged between the upper mold and the movable slidi