Bending die

The invention relates to a bending die. The bending die comprises a male die body and a female die body. Supporting shafts which are used for supporting and bending a copper bar and matched with the male die body are arranged on the female die body. A first guide face for preventing the side wall of the copper bar from deforming and a second guide face corresponding to the first guide face are arranged on the female die body. An ejecting mechanism for ejecting the copper bar from the portion between the first guide face and the second guide face is arranged between the first guide face and thesecond guide face. The ejecting mechanism comprises swinging arms which are arranged on the supporting shafts in a sleeving manner and can rotate around the supporting shafts. According to the die, the groove matched with the copper bar for positioning is formed in the female die body. When the copper bar is bent, the first guide face and the second guide face can support the side wall of the copper bar, longitudinal ben