PC concrete durability protection coating series is composed of base coating, medium coating and top coating. The medium coating PC-01 is an alkali-resistant coloring coating with excellent alkaline resistance, mildew resistance and algae resistance. At the same time, it can adjust and repair the concrete color difference, close to the desired appearance color of the exposed concrete, and provide beautiful coloring effect. PC-02 has high weather resistance and strong self-cleaning effect, to prevent the phenomenon of ultraviolet degradation, yellow, aging, color difference and uneven luster, and has excellent corrosion resistance, stain resistance and atmospheric corrosion resistance, maintain the natural texture and texture of the composite coating, and improve the service life of the composite coating.