The invention discloses a pumping machine which comprises a pumping system and an under frame, wherein the pumping system comprises a pumping power device, a hopper, an elastic buffer mechanism and a connecting rod; the elastic buffer mechanism is fixedly connected with one of the pumping power device and the under frame to form a fixed connection point, and is hinged with the other one of the pumping power device and the under frame to form a hinged connection point; the fixed connection point has a preset distance with the hinged connection point; the two ends of the connecting rod are respectively hinged with the hopper and the under frame; and a three-hinge structure is formed between the pumping system and the under frame of the pumping machine. When the pumping machine carries out pumping operation, the three-hinge structure can ensure the stability between the pumping system and the under frame, and reduces the vibration transmitted to the under frame by the connecting rod; theelastic buffer mechanism can buffer the vibration and the impact of the pumping power device on the under frame; and when the pumping system has processing errors, the three-hinge structure can automatically adapt to the position relation between the pumping system and the under frame, and is convenient for assembling the pumping system and the under frame.