The invention relates to a konjac glucomannan membrane haze-prevention mask. A mask body of the konjac glucomannan membrane haze-prevention mask is composed of four layers which specifically include the first layer, namely, the outmost layer, made of non-woven fabric, the second layer made of a konjac glucomannan porous membrane, the third layer made of a konjac glucomannan nanometer porous membrane, and the fourth layer, namely, the layer in contact with the face, made of non-woven fabric. With natural polymer polysaccharide, namely, konjac glucomannan, serving as the main ingredient, the konjac glucomannan membrane haze-prevention mask has various characteristics of hydrophilia, the thickening characteristic, stability and the like. In recent years, natural polymer compounds are widely applied to the material field, and many problem emerging on material safety are solved. The technology of preparing high-quality nanometer porous membranes with plant polysaccharide serving as the raw materials become a hot point in recent years; according to the method, the special gel property of konjac glucomannan is utilized, and the konjac glucomannan nanometer porous membrane is obtained through application of the electric field technology, and has great application potential in the material field. The konjac glucomannan membrane haze-prevention mask has higher indexes such adsorption performance, safety, raw material price and potential markets than those of other masks on the market, and can be selected by mass consumers as high-quality haze-prevention masks.