The present invention discloses a desktop air purifying device comprising a gas guiding device, an ozone-free ultraviolet sterilizing device, a hollow cylindrical filter, a detachable hollow sleeve, a bottom cover and a top ring. The ozone-free ultraviolet sterilizing device is disposed at the bottom of the air guiding device, the hollow cylindrical filter surrounds the ozone-free ultraviolet sterilizing device, and the detachable hollow sleeve is sleeved on the air guiding device and the hollow cylindrical filter. The bottom cover is disposed at the bottom of the detachable hollow sleeve, and the top ring is disposed at the top of the detachable hollow sleeve and the air guiding device, and the air guiding device attracts air to purify the air by using ultraviolet rays, and then extracts the air. The desktop air purifying device of the present invention not only has a small volume and does not occupy a space, but also absorbs a large amount of air to effectively purify the air.本創作係揭露一種桌上型空氣淨化裝置，包含一導氣裝置、一無臭氧紫外線殺菌裝置、一中空筒狀過濾器、一可拆換式中空套筒、一底蓋與一頂環。無臭氧紫外線殺菌裝置設於導氣裝置之底部，中空筒狀過濾器圍繞無臭氧紫外線殺菌裝置，可拆換式中空套筒套設於導氣裝置與中空筒狀過濾器。底蓋設於可拆換式中空套筒之底部，頂環設於可拆換式中空套筒與導氣裝置之頂部，導氣裝置吸引空氣，以利用紫外線淨化空氣，再導出空氣。本創作之桌上型空氣淨化裝置不但體積小不佔空間，並吸取大量的空氣以有效淨化空氣。
