Vegetable protein adhesive and method for preparing artificial board

The invention discloses a vegetable protein adhesive and a method for preparing an artificial board. The vegetable protein adhesive is composed of a main agent and a cross-linking agent, wherein the main agent is prepared from, by weight, 40-100 parts of vegetable protein, 5-15 parts of solid alkali and 5-15 parts of carbonate; the cross-linking agent is a papermaking wet strength agent containingN heterocyclic ring structures or a polyisocyanate compound containing isocyanate groups, and the weight part of the cross linking agent is 50-100. The main agent and the cross linking agent are packaged and stored respectively, when the artificial board is prepared, the main agent and the cross linking agent cooperate in use, in the presence of water, the solid alkali and the carbonate in the main agent react to form strong base so as to break the ball structure of the vegetable protein, so that the internal functional groups are exposed; the internal functional groups react with the N heterocyclic ring or the isocy