Filter element assembly for cross-flow filtration

The invention discloses a filter element assembly for cross-flow filtration, which has high filterability. The filter element assembly comprises a container provided with a cavity stock solution inlet, a clean solution outlet and a concentrated solution outlet, wherein a clean solution cavity, which is communicated with the clean solution outlet, and at least two filter element devices are arranged in the container; each filter element device comprises at least two cylindrical filter elements which are sleeved one another at intervals; an interval region between every two cylindrical filter elements in each filter element device forms a filter cavity; both ends of each filter cavity are respectively communicated with the stock solution inlet and the concentrated solution outlet; the region between the outer side of each filter cavity and the inner wall of the container constitutes a common outer clean solution cavity; the inner region of each filter cavity constitutes an independent inner clean solution cavity; and each inner clean solution cavity is communicated with the outer clean solution cavity. At least two filter element devices are arranged in the container, and at least two cylindrical filter elements in each filter element device greatly increase the cross-flow area of the filter elements, thereby enhancing the filtration capacity of the filter element assembly.