The invention relates to an aerogel core material capsule, paint prepared from the same and a preparation method of the paint, in particular to the paint which is prepared by conducting encapsulation on aerogel particles through a suspension coating method and adding a film forming agent, reinforcement powder, function powder and an additive with the capsule, with aerogel particles as the core material, as the main thermal insulation component, and has the nanometer porous structure. Encapsulation is conducted on aerogel particles through the suspension coating method, it is avoided that water or other reagents permeate aerogel nano-pore particles to generate capillary force and damage porous structures, and therefore the paint of the complete nano-pore structure is prepared. The prepared paint has excellent thermal insulation performance and is easy to operate, low in production cost, green, environmentally friendly, safe, capable of being applied to thermal insulation and corrosion prevention of devices such as hearths, pipelines, valves and storage tanks in the fields of aviation and military, metallurgy forging, petroleum refining, electric power, ships and the like, and also capable of being used for heat preservation and thermal insulation in the field of construction.