本发明公开了一种抗菌涂层的制备方法，首先对基材表面进行清洗，然后进行层层组装，依次将浓度为1～10mg/mL盐酸多巴胺溶液和5～100mM硝酸银溶液旋涂于预处理后的基材表面，旋涂完两个溶液作为一个层层组装循环，共循环1～20次，然后氮气吹干；最后将旋涂后得到的材料置于波长200～400nm、功率5～1000W的紫外灯下照射5～30min，得到表面含有纳米银的抗菌涂层。本发明利用紫外光引发多巴胺聚合同时还原硝酸银形成纳米银，具有步骤简单，反应时间短，无需特殊设备，适用基质材料广，制备成本低的优点，为材料表面抗菌涂层的制备提供了新思路。

The invention discloses a preparation method of an anti-bacterial coating. Firstly, the surface of a base material is cleaned, then layer-by-layer assembly is performed, the surface of the pre-processed base material is sequentially coated with a hydrochloride dopamine solution with the concentration being 1-10 mg/mL and a silver nitrate solution with the concentration being 5-100 mg/mL in a spinning mode, layer-by-layer assembly circulation is complete one time after spin coating of the two solutions is completed, circulation is performed for 1-20 times, and then blow-drying is performed through nitrogen; finally, a material obtained after spin rotation is placed under an ultraviolet lamp with the wavelength being 200-400 nm and the power being 5-1000 W to be irradiated for 5-30 min, and the anti-bacterial coating with nano silver on the surface is obtained. Dopamine polymerization is triggered through ultraviolet light, meanwhile, silver nitrate is reduced into nano silver, the advantages that the steps are simple, reaction time is short, no special devices are needed, the range of applicable matrix materials is wide, and preparation cost is low are achieved, and a new idea is provided for preparation of the anti-bacterial coating on the surfaces of the materials