This invention for the environment-friendly anti-icing device is disclosed. This eco-friendly freezing protection device of the invention: Part buoyancy is molded from a material floating in the water, located in the buoyant portion upper located Customized Solar to lower solar heating unit and the buoyancy unit that converts electrical energy and in the sub-solar heating one using the heat generating at least any one or more of heat of caused by heat and calcium oxide by heating and the microorganism according to the generated electric heating the flowing water from the outside and then to include a frost protection to prevent water freezing was again discharged to the outer side It characterized.