The invention discloses a green environment-friendly construction adhesive which is composed of the following components in parts by weight: 25-40 parts of lignin adhesive, 25-35 parts of phenol formaldehyde resin, 25-35 parts of epoxy resin, 5-12 parts of polyvinyl alcohol, 6-8 parts of hydroxymethyl cellulose, 2-5 parts of potassium sulfate, 2-5 parts of water-based tackifying powder, 40-50 parts of oxidized starch, 6-12 parts of plasticizer, 2-8 parts of borax, 1-3 parts of preservative and 5-10 parts of alum. The green environment-friendly construction adhesive has favorable binding properties and penetrability for multiple materials; the construction adhesive has high binding strength, so the bound seam is solid and firm; the application method of the construction adhesive is simple and easy to operate; and the construction adhesive is nontoxic and odorless and belongs to a green environment-friendly product, and thus, the product has broad market prospects.