High speed train body surface matching middle and top coating

The invention discloses a high speed train body surface matching middle and top coating. According to the invention, polyester modified acrylic resin and a polyisocyanate curing agent form a film forming matter, titanium dioxide, an infrared pigment, ceramic microbeads, precipitated barium sulphate, sericite, powdered steatile and the like are used as pigments and fillers, and nano-SiO2 is used as a modified material. All the above materials are used with the cooperation of a functional auxiliary agent and a non-benzene solvent to prepare the two-component high speed train body surface matching middle and top coating. The high speed train body surface matching middle and top coating has characteristics of high adhesive force, high hardness, good flexibility, shock resistance to sandstone, thermal insulation and energy saving performance, corrosion resistance, temperature alternating resistance, high weatherability, chemical resistance, stain resistance, weatherability, high decorative performance, strong safety performance and long service life, and is applicable to be used as a protective coating on the high speed train body surface.