The invention discloses a hydrophobic stain-resistant coating for hydraulic concrete surfaces. The hydrophobic stain-resistant coating comprises an inner coating and an outer coating. The inner coating is a fluorine-containing resin matrix, the fluorine-containing resin matrix comprises component materials A and component materials B, and the component materials A comprise, by weight, 60-100 parts of fluorine-containing resin, 10-60 parts of organic solvents and 2-20 parts of hydrophobic nanometer materials; the mechanical stirring rotational speeds are 500-1000 rpm, and the stirring time is 3-8 h; the component materials B comprise, by weight, 6-10 parts of curing agents; the outer coating comprises fluoroalkyl silane with low surface energy. The hydrophobic stain-resistant coating has the advantages that shortcomings of poor adhesion and comprehensive performance, insufficient durability of hydrophobic properties and high cost of existing coatings with low surface energy can be overcome by the aid of the hydrophobic stain-resistant coating; methods for preparing the hydrophobic stain-resistant coating are simple, and the hydrophobic stain-resistant coating is high in hydrophobic property, stain resistance and durability. The invention further discloses a method for constructing the hydrophobic stain-resistant coating for the hydraulic concrete surfaces.