The large displacement hydrogen compressor is one of the core equipment of the hydrogen refueling mother station or hydrogen production station, which pressurizes the medium and low pressure hydrogen delivered from the hydrogen production pipeline to 20~22MPa, and charges the tube trailer through the hydrogen refueling column. It is designed in accordance with GB50177, GB50516, GB50156 and other relevant national standards to meet the needs of hydrogen refueling stations or hydrogen production stations, and is characterized by energy-saving, high efficiency, fast filling speed, high automation and high integration.