CeO2 microparticles (10μm, 1μm and 100nm) and diluent were mixed with fluorocarbon resin to fabricate high hydrophobic coatings on the glass fiber reinforced epoxy composite substrates.The diameter of CeO2 microparticles and the proportion of CeO2, diluent and resin influenced the contact angle significantly.This work optimized the proportion to get hydrophobic coatings by orthogonal experiments and compared the influence of particles with different sizes.The optimum mass ratio of fluorocarbon resin, CeO2 microparticles (100nm) and diluent was 0.5∶1.1∶3.0, which leaded to the highest contact angle up to 145°.This work also employed sand-impacting method to quantify the mechanical stability of the coatings.The coatings of 10μm showed better durable properties.Their water contact angles first decreased then increased with the sand impacting, Some of which were even higher than 150° before the coatings were totally abrased.The longest impacting time was 120s.The scanning electron microscopy was used to observe the microstructure of the coatings.The images showed that the CeO2 microparticles formed nano/microscale hierarchical structure on the surface of the coatings.This work improved dramatically the contact angle of current commercial hydrophobic coatings applied to wind turbine blades with relatively high mechanical durability.