The invention provides a superhydrophobicity coating based on waterborne emulsion. The coating is composed of waterborne emulsion, inorganic nanoparticles, a silane coupling agent containing fluorine and ethyl alcohol. The coating is prepared from, by mass, 5-50% of the waterborne emulsion, 1-20% of the inorganic nanoparticles, 0.1-2% of the silane coupling agent containing fluorine, and the balance ethyl alcohol; the preparing method comprises the steps of spraying the coating on a glass, metal and paper base, and drying at a temperature of 50 DEG C, so that the superhydrophobicity coating is obtained; the contact angle of static water of the coating is bigger than 150 degrees, and the rolling angle is smaller than 10 degrees. The superhydrophobicity coating has the advantages that 1, the waterborne emulsion is adopted as a main raw material, the adopted dilution dispersing agent is the ethyl alcohol, the use of a VOC solvent is avoided, and the superhydrophobicity coating thus has environment friendliness; 2, the superhydrophobicity coating is prepared through simple synthesis of the waterborne emulsion, the inorganic nanoparticles and the silane coupling agent containing fluorine, the steps is simple, the preparing process is easy to control, and large-scale industrial production is promoted.