Composite coating for preventing attachment of limnoperna fortunei and preparation method of composite coating

The invention discloses a composite coating for preventing attachment of limnoperna fortunei. The composite coating comprises a tough epoxy closed bottom coating, an organic silicon anti-attachment middle coating and a fluorine-silicon anti-attachment surface coating which are sequentially arranged from inside to outside, the tough epoxy closed bottom coating comprises the following components: silane coupling agent modified epoxy resin and a polyether amine epoxy curing agent; the organic silicon anti-adhesion floating coat comprises the following components: 107 silicon rubber, a cross-linking agent, a nano filler, a diluent and a catalyst; the fluorosilicone anti-adhesion surface coating comprises the following components: hydroxyl fluorosilicone oil modified silicone rubber, a nano filler, a diluent and a catalyst. The composite coating can effectively reduce breeding and attachment of aquatic organisms such as limnoperna fortunei and impurities on the inner walls of tunnels and pipelines in water conveya