Portable water purifier and filtering device comprised by the same

The present invention relates to a portable water purifier and a filtering device comprised by the same. The portable water purifier comprises a cylinder body (3), a threaded connection water inlet (3.1) located at bottom of the cylinder (3), a transverse conversion chamber (3.2), a water absorption cavity (3.3), a purification chamber (3.4) located in the center of the cylinder body (3), and a large male thread mouth (3.5) and a small male thread mouth (3.6) located on the upper part of the cylinder body (3). The threaded connection water inlet (3.1) and a water inlet connector (4) are fixed through threaded connection; an integrally disassembled sequence converter (5) is fixed in the transverse conversion chamber (3.2); an integrally inserted water-drawing device (6) is fixed inside the water absorption cavity (3.3); the small male thread mouth (3.6) is connected with a small nut (7) provided with a guide pressure relief opening (7.1); a purification device (2) is fixed in the purification chamber (3.4); and the large male thread mouth (3.5) is connected with a large nut (1) provided with a threaded connection water purification port (1.1).