Forming die of bearing outer ring and method for manufacturing bearing outer ring by adopting forming die

The invention discloses a forming die of a bearing outer ring and a method for manufacturing the bearing outer ring through the forming die, and belongs to the technical field of manufacturing of bearing outer rings. The mold comprises an upper mold plate, a lower mold plate and a core column, the upper mold plate is arranged above the lower mold plate, and the core column is arranged in the upper mold plate and the lower mold plate; a first through groove and a second through groove are formed in the top and the bottom of the upper mold plate respectively, the first through groove is communicated with the second through groove, a groove is formed in the top of the lower mold plate, and when the upper mold plate moves towards the lower mold plate to the position where the upper mold plate abuts against the lower mold plate, the inner wall of the second through groove and the inner wall of the groove are located on the same spherical surface; when the core column is placed in the first through groove, the seco