Preparation method of barium sulfate-containing building exterior wall coating

The invention relates to the technical field of exterior wall coatings, and discloses a preparation method of a barium sulfate-containing building exterior wall coating, wherein the preparation method comprises the following steps: preparing raw materials comprising 20-40 kg of water, 40-80 kg of titanium dioxide, and 8-20 kg of talc powder. According to the preparation method of the barium sulfate-containing building exterior wall coating, the barium sulfate-containing building exterior wall coating has a function of efficiently reflecting sunlight, and when the sunlight violently irradiates an exterior wall, the indoor temperature can be reduced by reflecting the sunlight, so that people work in an environment with a relatively proper temperature, the working efficiency is improved, and the indoor temperature is reduced without using an air conditioner; the greenhouse effect cannot be increased, moreover, energy is saved and the environment is protected; and the problems that an existing exterior wall coati