Vacuum pump is a rotary variable volume gas delivery pump. The vacuum pump can be used only with the cooperation of the front stage pump. It has a large pumping speed in a wide pressure range and is not sensitive to the dust and steam contained in the pumped gas. It is widely used in metallurgy, chemical industry, food, electronic coating and other industries. The development of vacuum pumps includes dry screw vacuum pumps, water ring pumps, reciprocating pumps, slide valve pumps, rotary vane pumps, roots pumps and diffusion pumps. These pumps are essential main pumps in the application of vacuum technology in various industries of China's national economy. In recent years, with the sustained and rapid development of China's economy, the downstream application industry related to vacuum pump has maintained a rapid growth momentum. At the same time, driven by the continuous expansion of vacuum pump application field and other factors, China's vacuum pump industry has achieved sustained and stable development. According to the analysis report on in-depth investigation and investment prediction of China's vacuum pump manufacturing industry from 2013 to 2017, the entry and success of foreign enterprises have become an indisputable fact in China's vacuum pump market. Japanese vacuum pumps are distributed everywhere, German Laibao is expanded in China, and Cathay Pacific Group South Korea Youcheng and other international famous manufacturers are also looking for partners to build manufacturing bases in China. They have a big appetite and are likely to swallow the vacuum pump market. In recent years, although some domestic enterprises gradually rise and occupy a leading position in the vacuum pump market, most enterprises have poor R & D ability. Compared with their foreign counterparts, high-end products are still at a disadvantage in technology.