Radiation refrigeration paint and coating for building energy conservation and related preparation method

The invention provides a preparation method of a radiation refrigeration coating for building energy saving. The preparation method comprises the following steps: (1) dispersing a particle mixture in an organic dispersion solvent to form a dispersion solution, wherein the particle mixture comprises alumina particles and common glass particles; (2) carrying out ball milling on the dispersion solution; the invention also provides a radiation refrigeration coating for building energy conservation prepared from the radiation refrigeration coating. The invention also provides a preparation method of the radiation refrigeration coating for building energy saving, and the radiation refrigeration coating for building energy saving prepared by the preparation method. The radiation refrigeration coating for building energy conservation is simple to prepare and low in cost, can be brushed on a base material to form a radiation refrigeration coating for building energy conservation, and has a stable structure and high su