The present invention relates to a multifunctional eco-friendly buoy and a manufacturing method thereof. The manufacturing method of the present invention comprises: a buoyancy body preparing step of preparing a buoyancy body which is to be used as a buoy； a perforation step of forming a through-hole in the buoyancy body； a first covering step of covering an inner circumferential surface of the through-hole and a portion of the side surface of the buoyancy body by using a flexible synthetic resin member； a second covering step of covering a region including a remaining portion of the side surface of the buoyancy body by using a heat shrinkable synthetic resin member； a heating step of applying heat to a resulting product finishing the first and second covering steps to shrink the heat shrinkable synthetic resin member； and a coating step of stacking a polyurea coating layer on the outer surface of the buoyancy body or the resulting product after the perforation step or the heating step. The multifunctional eco-friendly buoy according to the present invention does not cause environmental contamination, is environmentally friendly, and reinforces durability, water resistance, insulation property, flexibility, impact resistance, anti-corrosion properties, weatherability, and wear resistance of the buoy by completely sealing the buoy with an eco-friendly polyurea coating layer such that there is no concern of exposing a Styrofoam during using of the buoy since there is not an adhesion portion or a fusion portion on the surface of the buoy at all. Further, the multifunctional eco-friendly buoy according to the present invention greatly improves installation workability by lightening weight of the buoy and forming a passage portion in a central part of the buoy to pass a rope through the passage portion, widens a range of applications and reduces manufacturing costs accordingly by enabling various methods of fastening the rope to be performed.본 발명은 다기능성 친환경 부표 및 그의 제조방법에
