The invention discloses a modified asphalt waterproof roll for tunnel engineering. The modified asphalt waterproof roll comprises a special roll, wherein a roller shaft is mounted inside the special roll; square supporting plates are mounted at the two ends of the roller shaft; a roll side bulge is arranged on the bottom surface of one side of the special roll; a roll side groove is formed in thebottom surface of the other side of the special roll; the special roll comprises a lining base layer, an anticorrosive layer, a buffer layer, a second isolating membrane, a surface waterproof layer, afireproof layer and a waterproof thick adhesive layer; the second isolating membrane is mounted above the waterproof thick adhesive layer; the buffer layer is mounted on the upper end surface of thesecond isolating membrane; the anticorrosive layer is mounted on the upper end surface of the buffer layer; the lining base layer is mounted on the upper end surface of the anticorrosive layer; the fireproof layer is mounted on the upper end surface of the lining base layer; the surface waterproof layer is mounted on the outer surface of the fireproof layer. The modified asphalt waterproof roll isstrong in waterproofness, has fireproof, cold-resistant and buffering performance and the like and is high in safety.