The miniature desktop vacuum pump is specially designed and manufactured for chemical inspection, clinical inspection, bioengineering, metallurgy, environmental protection and other laboratories. The vacuum decompression device can perform liquid suction, discharge or decompression, and is widely used in the extraction of supernatant and sediment after centrifugation, the preparation of monoclonal antibodies, the supernatant after fusion, and the enzyme-linked immunosorbent porous plastic plate It can be used for rapid liquid extraction in spectrophotometers with flow cell devices or various biochemical analyzers. It can also replace the water flow impingement and decompression glass water pump.