The invention discloses a hydrogel antifouling 
fiber, a preparation method of hydrogel antifouling 
fiber and a preparation method of an implanted type high-strength hydrogel antiflouling 
coating layer, and relates to antiflouling materials, preparation methods of the antiflouling materials, and preparation methods of vessel 
antifouling coating layers, for mainly solving the technical problems that the conventional PVA (
Polyvinyl Acetate) 
fiber implanted type vessel antiflouling 
coating layer is poor in antifouling effect and short in service life. The hydrogel antifouling fiber disclosed by the invention is a fiber with a core-shell structure, the shell layer of the fiber is made of 
polyacrylamide, and the core layer is made of carbon 
nano tube modified 
polyacrylamide. The preparation method comprises the following steps: 1, preparing 
polyacrylamide hydrogel, 2, preparing a core layer 
spinning dope, 3, preparing a shell layer 
spinning dope, 4, 
spinning by using a wet method to obtain the hydrogel antifouling fiber. The preparation of the 
antifouling coating layer comprises the following steps: spraying implantation gel onto a substrate, further implanting the hydrogel antifouling fiber into the substrate through a high-pressure static implantation technique, and 
drying to obtain the implanted type high-strength hydrogel 
antifouling coating layer. The 
coating layer is not changed when being soaked in 
seawater or 
industrial water for 6 months, so that the coating layer can be applied to vessel antifouling.