This pump is based on the multi-purpose vacuum pump for circulating water, taking into account the small laboratory area and referring to the Japanese desktop pump, with a one-time molded shell and reduced volume improvement. It has the characteristics of small volume, light weight, and beautiful appearance. This machine adopts two taps and can be used separately or in parallel. It is equipped with two vacuum gauges. The host is made of 304 stainless steel core material. Corrosion resistant, pollution-free, low noise, easy to move, and can also be equipped with vacuum regulating valves according to user needs. Two students can conduct chemistry experiments simultaneously to reduce the experimental space.