There are many kinds of liquids in the pharmaceutical industry, including water, solvents, liquid medicines, etc. The components are also relatively complex, and the physical and chemical properties and process conditions are also quite different. Therefore, the role of filters in the pharmaceutical industry is particularly important. The filter can effectively filter and purify the basic water and liquid medicine; isolate and remove impurities and pollutants in the sewage produced by the pharmaceutical industry, so as to avoid the pollution of the sewage to the environment.