Preparation method for biomimetic mussel adhesive used for adhesion on wet surface and underwater curing

The invention relates to a preparation method for a biomimetic mussel adhesive used for adhesion on a wet surface and underwater curing. The method is characterized in that the biomimetic mussel adhesive is composed of two components including A and B, wherein the component A is a methanol solution of a polymer containing catechol groups; the polymer containing catechol groups is obtained in the manner that N-vinyl pyrrolidone and a polymerizable catechol derivative monomer are subjected to free radical polymerization and further subjected to deprotection; the component B is a crosslinking curing agent. The method has the advantages as follows: 1, the synthetic method is simple and efficient, raw material and reagents used in the reaction process are low in price and easy to get, and amplification in the operation process and industrial production are facilitated; 2, the biomimetic mussel adhesive has certain biocompatibility and initial adhesion performance, can be used for adhesion on the wet surface and un