The invention discloses a bead feeding mechanism of a fully-automatic loading and unloading switcher and a bead feeding method thereof. The bead feeding mechanism comprises a bracket, the upper end of the bracket is fixedly provided with a receiving box, the bottom of the bracket is provided with a bead feeding cylinder, a piston rod of the bead feeding cylinder is provided with a bead loading plate linked and matched with the bead feeding cylinder, the bead loading plate can movably pass through the bottom of the receiving box, and the bead loading plate is fixedly provided with a die needle side by side, the bracket is provided with a vibratory bead cylinder opposite to the side wall of the piston rod of the bead feeding cylinder, the head end of a piston rod of the vibratory bead cylinder is fixedly provided with a vibrating plate, and the piston rod of the bead feeding cylinder relative to the upper end of the vibrating plate is fixedly provided with a vibrating block which is clamped and matched with the vibrating plate in the extending direction of the piston rod of the bead feeding cylinder. The bead feeding mechanism has the advantages of good stability, low failure rate, high production efficiency, and the like.