The invention discloses a method for preparing a transparent super-oleophobic coating on a metal surface. The method comprises the following process steps: respectively using petroleum ether and acetone to clean the surface of a base material, and heating and drying; mixing polyacrylonitrile, epoxy resin and N,N-dimethyl formamide to obtain a polyacrylonitrile and epoxy resin compound solution, spraying the polyacrylonitrile and epoxy resin compound solution onto the surface of the base material, and drying the base material at the temperature of 70 to 120 DEG C for 1-5 hours; then coating polytetrafluoroethylene particle dispersion liquid on the surface of the base material, and drying at the temperature of 80-110 DEG C for 1-5 hours; finally, using acetone to clean the surface of the base material to obtain the stabile transparent super-oleophobic coating. The method can prepare the transparent super-oleophobic coating on the surface of a complicated metal structure in a large-area manner and is simple in process, easily accessible in raw materials, low in cost and suitable for industrial production; the prepared transparent super-oleophobic coating is long in service life and wear-resistant, can be firmly combined with the base body, has favorable oleophobicity, corrosion resistance and light-transmitting performance, and can be used for oleophobic modification of most metal base material surfaces.