Scale inhibitor is a type of chemical agent that can disperse insoluble inorganic salts in water, prevent or interfere with the precipitation and scaling of insoluble inorganic salts on metal surfaces, and maintain good heat transfer performance of metal equipment. The anti-corrosion and scale inhibitor for cold exchange equipment is formulated with epoxy resin and specific amino resin as the base materials, and added with appropriate amounts of various anti rust, anti-corrosion and other additives, as a single component. It has excellent shielding, impermeability, rust prevention performance, good scale inhibition, thermal conductivity, excellent resistance to weak acids, strong alkalis, organic solvents, etc. It has strong adhesion, and the film layer is bright, flexible, dense, and hard.