Abstract: The stain–resistant and self–cleaning paint hass attracted great attention for its special properties. The preparation of hydrophobic and self–cleaning paint with excellent performance by combining the theories of phase–separation and “lotus–effect” with the composite method of nano and organic materials has received a lot of research attention recently. The reason of being stained easily for outdoor paint and the methods adopted usually to improve the property of stain–resistance were stated briefly. The applications of new technical methods in hydrophobic paint were introduced.