The invention provides super-hydrophobic and anti-seepage gum based on waste mountain flour. The super-hydrophobic and anti-seepage gum is prepared from powder and slurry, wherein a film-forming agent is prepared from green and environment-friendly pea amylose ingeniously cooperating with methyl methacrylate, butyl acrylate and acrylic acid, an adhesive film can be formed on the surface of a stone material, and good toughness and mechanical strength are realized; an initiator is mainly used for promoting formation of the adhesive film and improving adhesion stability; a water-retaining agent is mainly used for enabling the slurry to be mixed uniformly, keeping good liquidity and facilitating construction coating. Meanwhile, by the aid of the waste mountain flour modified with a hydrothermal method, interfacial properties can be effectively improved, and the interface has the super-hydrophobic performance through roughness formation, so that anti-seepage and waterproof effects are achieved.