Porous material made of Chinese herbal medicine extracted residues and application of porous material

The invention discloses a preparation method of a porous material made of Chinese herbal medicine extracted residues. Meanwhile, the invention discloses application of the porous material made of the Chinese herbal medicine extracted residues for adding the porous material into cigarette filters so as to reduce tar and lessen harm for cigarette smoke and/or increase moist feeling of the smoke.