The invention discloses a feeding and discharging mechanical arm and device for the stamping process. The feeding and discharging mechanical arm structurally comprises an electric control cabinet, a rack, a main rotating shaft, a fixing base, a vertical shaft, a first mechanical arm body, a second mechanical arm body, a first mechanical claw and a second mechanical claw. The included angle between the first mechanical arm body and the second mechanical arm body ranges from 90 degrees to 120 degrees, and the first mechanical arm body and the second mechanical arm body can move vertically along with the vertical shaft. The vertical shaft and the fixing base can rotate horizontally along with the main rotating shaft. The main rotating shaft, the vertical shaft, the first mechanical arm body and the second mechanical arm body are driven by different motors, and all the motors are electrically connected with the electric control cabinet. The feeding and discharging mechanical arm has the functions of taking and placing materials automatically and flexibly, is suitable for single-process stamping as well as whole-line multi-station stamping, solves the technical problems that existing equipment is low in applicability, low in working efficiency and likely to cause industrial accidents, and improves working efficiency, flexibility and safety.