Ultrafiltration device

The utility model provides ultrafiltration equipment, relates to the technical field of filtering devices, and solves the problems that the existing ultrafiltration equipment is inconvenient to put into a biological safety cabinet/low-temperature cabinet due to overlarge volume, and the environmental requirements required by biopharmacy are difficult to ensure. The equipment comprises a backflow end assembly, an ultrafiltration assembly and a permeation end assembly which are arranged in a split mode, the liquid inlet end of the ultrafiltration assembly is communicated with the backflow end assembly through a liquid inlet pipeline, the backflow end is communicated with the backflow end assembly through a backflow pipeline, and the permeation end is communicated with the permeation end assembly through a permeation liquid pipeline; feed liquid in the backflow end assembly can flow into the ultrafiltration assembly through the liquid inlet pipe via the liquid inlet end to be filtered, macromolecular substances