The invention discloses heat-insulating, waterproof and environment-friendly paint and a preparation method thereof. The heat-insulating, waterproof and environment-friendly paint is prepared by adding a porous inorganic material into acrylic
emulsion, and combining pigments, auxiliaries and a
lotus effect self-
cleaning agent. The heat-insulating, waterproof and environment-friendly paint has very good solar reflecting ability and
extensibility, has a reflecting rate of 86% on
sunlight, has
radiance of 0.88, has absorbing ability of 99.9% on
ultraviolet light, and can effectively inhibit the temperature of a coated object from quickly increasing under the
irradiation of sunshine. In hot summer, the heat-insulating, waterproof and environment-friendly paint can effectively isolate solar
radiant heat, so that the working time of an air conditioner is reduced, and
energy resources are saved. Besides, the
solid content of the paint exceeds 65%, and the paint is high in covering power, has good
extensibility and waterproof function, and is guaranteed to be not cracked while used on the surface of an object with fierce temperature variation and obvious expansion and concentration, so that good waterproof
rust-proof protection is provided for equipment, a pipeline, a
storage tank and the like. The paint is rich in color and long in service life, and not only provides a remarkable energy-saving effect, but also achieves the effect of beautifying a building.