The invention relates to the field of materials, in particular to an antibacterial haze-preventing mask material containing bamboo leaf flavonoid. The antibacterial haze-preventing mask material comprises a supporting material located on a bottom layer, a nanofiber mesh layer and a nanofiber membrane layer containing bamboo leaf flavonoid, wherein the nanofiber mesh layer and the nanofiber membrane layer are sequentially combined to the supporting material. According to the antibacterial haze-preventing mask material, firstly, nanocomposite is prepared through melt extrusion pilling, then, spinning is carried out through the melt electrospinning technology, natural mineral nano materials can be evenly spread into a polypropylene or polyester material, and melt electrospinning interruption caused by natural mineral nano material agglomeration can be avoided. In addition, the mask material is composed of thick melt electrospinning fiber and thin solution electrospinning fiber and can effectively block most PM2.5 particles, and anions released by the natural mineral nano materials has an effect of capturing the PM2.5 particles. In addition, the mask material contains bamboo leaf flavonoid, has an antibacterial function and has the fresh bamboo flavor.