The thermal insulation material integrates high-efficiency thermal insulation, energy-saving thin layer, and external protection. Building insulation mainly takes measures from the inside and the outer envelope of the building, and measures to reduce the indoor heat dissipation of the building to the outside have an important role in creating a suitable indoor thermal environment and saving energy. A reflective thermal insulation coating can form a three-dimensional network hollow structure connected by closed microbeads on the surface of a building wall.