Vacuumizing gas buffer tank and pump station fertilization system

The utility model discloses a vacuum-pumping gas buffer tank and a pump station fertilization system, the vacuum-pumping gas buffer tank comprises a tank body, the top of the tank body is provided with a gas outlet pipe and a transparent gas inlet pipe, the bottom of the tank body is provided with a tubular hand valve seat which is through up and down, and the hand valve seat is communicated with the buffer tank. A lower port of the hand valve seat is provided with an elastic valve plate used for opening and closing the lower port, and the air outlet pipe is connected with an inlet of the vacuum pump. The vacuumizing gas buffer tank disclosed by the utility model can be applied to a pump station fertilization system, and the gas inlet pipe can adopt a transparent PVC (Polyvinyl Chloride) hose, so that the vacuumizing degree can be more intuitively grasped, and the working efficiency and quality are improved; and the bottom of the vacuumizing gas buffer tank is provided with the flexible valve plate which can