Based on the technique of RTV, the superhydrophobic coating was prepared at room temperature by using hydroxyl-terminated polydimethylsiloxane as the film-forming resin which combined nanometer silicon dioxide with different size.The morphology of coating surface was characterized and the hydrophobic performance was analyzed. The results indicate that there is a micro-nano binary structure similar lotus leaves on coating surface, which can make the highest static state contact angle of 165°and the lowest slide angle of 3. 8°between coating surface and water droplet. It is found via icing test that the super-dydrophobic coating made via this method has obvious anti-icing effect due to it can delay the growth rate of icing process during the early period.