Ultrafiltration membrane water purification device convenient to assemble, disassemble and wash

The ultrafiltration membrane water purification device comprises a shell module and a hollow fiber membrane filter element module detachably installed on the shell module, the shell module comprises a cylindrical shell and end socket assemblies covering openings in the two ends of the shell in a sealing mode, and the hollow fiber membrane filter element module is detachably installed on the shell module. The hollow fiber membrane filter element module comprises rubber cup bases at the two ends, a central supporting rod supported between the centers of the rubber cup bases at the two ends, and a plurality of hollow fiber membrane tows arranged between the rubber cup bases at the two ends and surrounding the central supporting rod, and the end parts of the hollow fiber membrane tows are glued and fixed with the rubber cup bases; the end socket assembly comprises an end socket body connected with the shell in an inserted mode, an end socket cover combined with the end socket body, and an adapter detachably conne