Bacteriostatic sponge piece and application thereof to tissue isolation or purification of strain of edible fungus

The invention discloses a bacteriostatic sponge piece and application thereof to the tissue isolation or purification of a strain of an edible fungus. According to the bacteriostatic sponge piece, a small-aperture sponge is cut into a round sponge piece with a diameter of 6mm and a thickness of 1mm; the round sponge piece is sterilized; afterwards, a sterile antibiotic solution containing streptomycin, gentamicin and kanamycin is dropwise added into the sponge piece; the sponge piece is air-dried at normal temperature, so that the bacteriostatic sponge piece which each contains 200 micrograms of the streptomycin, 100 micrograms of the gentamicin and 100 micrograms of the kanamycin is prepared; next, the bacteriostatic sponge piece is used for the tissue isolation of the strain of the edible fungus or the purification of a stock culture of the edible fungus. The bacteriostatic sponge piece can be used for greatly improving the success rates of the tissue isolation and purification of the strain of the edible f