The utility model provides a desktop air purifier. This desktop air purifier includes: the fuselage configures the air intake of following on its perisporium into and sucks the air current and upwards blow, and purifies the air current that gets into the fuselage, with the top cap subassembly, to install on the top of fuselage, it has cyclic annular air outlet air flue to inject in it, configures into and receives the air current after purifying from the fuselage to desktop air purifier's circumference discharge desktop air purifier is followed to air current after the messenger purifies. The utility model discloses a desktop air purifier is owing to have fuselage and top cap subassembly, simple structure, clearly demarcated, compact, small, remove convenient, the use is convenient. And air outlet air flue is annular air outlet air flue, can blow the air current all around to it, is particularly suitable for placing and uses in the desktop.