The invention discloses an energy dissipating and slow closing type air feeding and exhausting valve. The energy dissipating and slow closing type air feeding and exhausting valve comprises a valve body, a valve cover which is positioned at the upper part of the valve body, and a floating barrel which can move up and down in the valve body, wherein an upper flowing chamber and a lower flowing chamber are formed in the valve body; the lower flowing chamber is used as a water inlet; the floating barrel is positioned in the upper flowing chamber; a guide rod is connected to the top part of the floating barrel, and the guide rod is fixed to a piston at the upper part of the valve cover through a nut; the piston is arranged in a cylinder; a throttle screw is arranged at the upper part of the cylinder and is fixed to the valve cover through a throttle nut; a steel ball is arranged in an empty cavity in the upper side edge of the cylinder; a spherical cap and a spiral curved water stopping plate are arranged on the valve body at the bottom part of the upper flowing chamber; and a lower guide rod is arranged in the lower flowing chamber. According to the energy dissipating and slow closingtype air feeding and exhausting valve, the spiral curved water stopping plate is additionally arranged at the bottom part of the valve body, and the throttle screw and the piston structure are additionally arranged on the top part of the valve cover, and thus the problem of water impacting and water hammer can be solved with low cost and high efficiency.