The invention relates to an environment-friendly adhesive which is prepared from the following components in parts by weight: 60 to 80 parts of chlorinated butyl rubber, 30 to 40 parts of nitrile butadiene rubber, 15 to 20 parts of epoxy resin, 18 to 22 parts of xylene, 22 to 28 parts of isocyanate, 10 to 20 parts of agar, 15 to 25 parts of emulsifier, 5 to 10 parts of white carbon black and 30 to40 parts of water. The environment-friendly adhesive has the advantages of good adhesion effect, environmental friendliness and no toxic and side effects.