Adhesive polymers, which contain an unusual amino acid, 3,4-dihydroxyphenylalanine (DOPA), can bind strongly to all organic or inorganic surfaces. However, due to DOPA's poor solubility in organic solvents, it is difficult for us to get desired adhesive polymers. In this paper, poly(N-benzyloxycarbonyl-3,4-dihydroxyphenylalanine) (PNBD) was synthesized based on the modified L-DOPA. Gel Permeation Chromatography was used to analyze the molecular weight of PNBD. The structure of PNBD was characterized by Fourier Transform Infrared Spectroscopy and Hydrogen-1 Nuclear Magnetic Resonance. The adhesive properties of PNBD were determined by lap shear tensile strength tests. The results indicated that PNBD was prepared successfully and had formidable adhesive performance on the various substrates.