In　the　current　highly　industrialized　living　environment,　air　quality　has　become　an　increasing　public　health　concern.　Natural　environments　like　forests　have　excellent　air　quality　due　to　high　concentrations　of　negative　oxygen　ions　originating　from　low-voltage　ionization,　without　harmful　ozone.　Traditional　negative　oxygen　ion　generators　require　high　voltage　for　corona　discharge　to　produce　ions.　However,　high　voltage　can　increase　electron　collisions　and　excitations,　leading　to　more　dissociation　and　recombination　of　oxygen　molecules　and　consequently　higher　ozone　production.　To　address　the　challenge　of　generating　negative　oxygen　ions　without　accompanying　ozone　production,　this　study　designed　and　constructed　a　low-voltage　negative　oxygen　ion　generator　based　on　nanometer-tip　carbon　fiber　electrodes.　The　advantage　of　this　device　lies　in　the　high　curvature　radius　of　carbon　fibers,　which　provides　high　local　electric　field　strength.　This　allows　for　efficient　production　of　negative　oxygen　ions　at　low　operating　voltages　without　generating　ozone.　Experiments　demonstrated　that　the　device　can　efficiently　generate　negative　oxygen　ions　at　a　working　voltage　as　low　as　2.16　kV,　28%　lower　than　the　lowest　voltage　reported　in　similar　studies.　The　purification　device　manufactured　in　this　study　had　a　total　decay　constant　for　PM2.5　purification　of　0.8967　min(-1)　within　five　minutes,　compared　to　a　natural　decay　constant　of　only　0.0438　min(-1),　resulting　in　a　calculated　Clean　Air　Delivery　Rate　(CADR)　of　0.1535　m(3)/min.　Within　half　an　hour,　concentrations　of　PM2.5,　PM1,　PM10,　formaldehyde,　and　TVOC　were　reduced　by　99.09%,　99.40%,　99.37%,　94.39%,　and　99.35%,　respectively,　demonstrating　good　decay　constants　and　CADR.　These　findings　confirm　its　effectiveness　in　improving　indoor　air　quality,　highlighting　its　significant　application　value　in　air　purification.