This product adopts advanced hydrophilic PP hollow fiber membrane material as the terminal ultrafiltration membrane for the first time in China. It has the characteristics of high strength (rupture strength>1.0MPa), acid resistance of 5J, bacterial corrosion resistance, high flux, non-toxic and odorless, and stable performance. After hydrophilic treatment on the membrane surface, the large number of microporous structures (average pore size: 0.02 × 0.2 μ m) in the membrane are utilized to allow water or small molecule substances in the solution to pass through the micropores smoothly under the pressure difference on both sides of the desert, while bacteria, large molecule organic matter, and impurity particles are intercepted, thereby achieving material separation, concentration, or purification. The dual pathway circulation process design makes the equipment structure more reasonable, backwashing more convenient, and effective. Mixing with other coarse filters, adsorbents, or adding 0D fungicides, etc; Compared to Liu Dao technology, it has higher efficiency in competition and is safer and more reliable after sterile ultrafiltration. It can be widely used for the separation, concentration, and purification of sub substances. Purification of media such as water, alcohol, and air in industries such as beverages, food, electronics, pharmaceuticals, fermentation, and chemicals; separation and concentration of biological agents; oil-water separation; and recovery of useful substances