The invention discloses an automatic feeding and discharging mechanism of a cold state axial vibration forming hydraulic machine. The automatic feeding and discharging mechanism comprises a feeding system, a positioning system, an operation system and a discharging system. The feeding system is used for conveying workpieces to the front side of a main machine. The positioning system is used for positioning the workpieces to the feeding system. The operation system is used for conveying the workpieces to a lower die from the feeding system and conveying the workpieces to the discharging systemfrom the lower die. The discharging system is used for discharging the workpieces. By means of the automatic feeding and discharging mechanism of the cold state axial vibration hydraulic machine, a pneumatic and motor servo control technology is adopted in the automatic feeding and discharging mechanism of the cold state axial vibration forming hydraulic machine, accurate feeding and discharging processes of the workpieces are achieved, the position is accurate and reliable in the control process, the performance is stable, the completely-automatic feeding process of a press is achieved, automatic production is achieved, the production efficiency is improved, the labor cost is reduced, the influences of human factors on workpiece quality are reduced, and therefore the economical efficiencyof the whole product is improved.