A negative ion air purifier comprising a body, wherein a peripheral portion of the segment is provided with an air inlet； a control circuit unit, the element is provided with at least one USB port； an negative ion generator electrically connected to the control circuit unit； and a fan disposed at the control Above the circuit unit； an LED lamp set comprising at least two LEDs of different colors； a switch for activating or deactivating the control circuit unit； and a top cover disposed on the open end of the top of the body and top A ring-shaped tapered air outlet gap is formed between the outer periphery of the cover and the open end of the top of the body； thereby, the negative ion generator is activated to generate negative ions by the switch through the control circuit unit, and the negative ions are pushed up by the fan. The wind gap spreads outward to achieve the effect of purifying the air.一種負離子空氣淨化器，包含一本體，其中段處周緣設有一入風口；一控制電路單元，元至少設有一USB連接埠；一負離子產生器，電性連接控制電路單元；一風扇，設在控制電路單元上方；一LED燈組，其至少包括二種不同顏色的LED所組成；一開關，用以啟動或關閉控制電路單元；以及一頂蓋，係設在本體頂部的開口端上，且頂蓋外周緣予該本體頂部的開口端之間，形成一環型錐狀的出風間隙；藉此，以開關透過控制電路單元來啟動負離子產生器產生負離子，並以風扇將負離子向上推送，經由出風間隙而向外擴散，以達淨化空氣之功效。
