The invention belongs to the technical field of biological fouling protection, and relates to an antifouling and antibacterial treatment method for a titanium and titanium alloy surface, which comprises the following steps: firstly, performing plasma activation on the titanium or titanium alloy surface, placing above a silane coupling agent and cyclohexane mixed solution, and vacuumizing a dryer for vapor deposition; then, placing titanium metal of which the surface is modified with silane coupling agent in a mixed solution containing dopamine and a hydrochloric acid solution of tris (hydroxymethyl) amino methane hydrochloride, and placing in a flask; adding methylbenzene and triethylamine, introducing nitrogen and dropwise adding bromo-isobutyryl bromide for reaction, then taking out, washing, blow-drying, and placing in another flask; sequentially adding 2,2'-Bipyridine, water, methanol and methy-propylene-acyloxy modified lycine, and then introducing nitrogen continuously; then adding cuprous bromide for performing polymerization, placing in a silver nitrate aqueous solution for reaction, and then washing thoroughly, thus realizing the antifouling and antibacterial treatment for the titanium metal surface. The process is simple, the operation is convenient, the suitable environment condition is wide, the broad-spectrum property is good, and the method has good antifouling and antibacterial performance.