Metal line punching die and punching machine

A metal line stamping die comprises a base, a stamping seat, an elastic part and a stamping part, the stamping seat is arranged above the base in a lifting and moving mode, the stamping part is arranged at the bottom of the stamping seat in a lifting and moving mode, and the elastic part is arranged between the stamping part and the base to drive the stamping part to move downwards. A first groove matched with a stamping part is formed in the middle of the base, a stamping head is arranged at the bottom of the stamping seat, a second groove matched with the stamping head is formed in the base, in the descending process of the stamping seat, the stamping part firstly conducts pre-stamping on a metal line, and then the stamping seat continues to descend by overcoming the elastic force of the elastic part. The stamping head and the stamping part completely stamp the metal line, and the stamping part slowly stamps the metal line under the action of the elastic part, so that the stamping uniformity of the metal li