NOVELTY - The method for producing an ultra-hydrophobic substrate provided at its surface with metallic nanoparticles, comprises applying a precursor layer on the strip-shaped substrate in a continuous process by spraying, dipping, scraping, brushing, offset printing, screen printing or stencil printing process, and continuously depositing the metallic nanoparticles from the precursor layer on the substrate by an electro-chemical process. The precursor layer is free from electronically-conductive soot particles. The applied precursor layer is dried with environmental-/decreased pressure at 20-200 degrees C.    USE - Method for producing an ultra-hydrophobic substrate provided at its surface with metallic nanoparticles, where the substrate is useful as gas diffusion electrode for fuel cells, electrolyzer, electro-chemical sensors or electro-chemical reactors (claimed).    ADVANTAGE - The method ensures simple, effective and economical production of the ultra-hydrophobic substrate with high catalytic efficiency in continuous manner without salt residue and other contaminants.    DETAILED DESCRIPTION - The method for producing an ultra-hydrophobic substrate provided at its surface with metallic nanoparticles, comprises applying a precursor layer on the strip-shaped substrate in a continuous process by spraying, dipping, scraping, brushing, offset printing, screen printing or stencil printing process, and continuously depositing the metallic nanoparticles from the precursor layer on the substrate by an electro-chemical process. The precursor layer is free from electronically-conductive soot particles. The applied precursor layer is dried with environmental pressure or decreased pressure at 20-200 degrees C. The precursor contains additives or additives having wetting agents, dispersing agents, binding agents, thickeners, stabilizers, antioxidants or inert substrates. The electro-chemical deposition is carried out by dilute sulfuric acid or perchloric acid, or water vapor-containing atmosphere. Galvanostatic pulse or constant flow is used for the electro-chemical deposition. Conductive carbon fiber papers, carbon fiber fleeces, carbon fiber fabrics, carbon fiber mesh, metal mesh, plastic fabrics or plastic substrates are provided as substrate. The surface of the substrate is partially provided with the ultra-hydrophobic layer. An INDEPENDENT CLAIM is included for a substrate.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic representation of a preparation of a catalytic layer on hydrophobic substrates.