The invention discloses a hydrophobic fabric. The hydrophobic fabric is prepared from a fabric, a fluorinating reagent and a fluorochemical containing double bonds. The invention further provides a preparation method of the hydrophobic fabric. The method includes the following steps that (1), the fabric and the fluorinating reagent suffer from a direct fluorinating reaction, and a fluorinated fabric containing free radicals is obtained; (2), the fluorinated fabric obtained in the step (1) and the fluorochemical containing the double bonds react in a solvent with certain solubility, and the hydrophobic fabric is obtained. The experimental result shows that the surface of the prepared super-hydrophobic fabric contains trifluoromethyl with excellent hydrophobicity, protruding spherical particles with the sizes being about 1-3 micrometers are arranged, the water contact angle reaches up to 160 degrees, the rolling angle is as low as 9 degrees, 100 times of standard washing and 200 times offriction testing can be resisted, and very broad application prospects are achieved.