Negative ion air filtering net and application thereof

The invention relates to a negative ion air filtering net. The negative ion air filtering net is provided with an upper insulation support and a lower insulation support, wherein ventilation holes are formed in bottom part of the lower insulation support, the upper insulation support is provided with a limitation neck for fixing a direct-through pipeline of a dust collection metal pipe, the negative ion air filtering net comprising a plurality of direct-through pipelines is favorably connected with the ground, a high-voltage electrode is arranged in the center of a part above the plurality of direct-through pipelines, a special power supply provides power for the high-voltage electrode, dustproof blocks are arranged at a left side, a right side and a middle part of the high-voltage electrode, an emitter is arranged in the center of each pipeline and is arranged on the high-voltage electrode, a part above the limitation neck of the upper insulation support is a high-concentration negative ion region (W), and a