ABSTRACT: Double-walled carbon nanotube (DWCNT) macro-films with large areas, excellent exibility and superhydrophobicity are reported. The area of the macro-film is larger than 30 cm£15 cm, and this large film can be bended, or folded without any damage, and even can be tailored freely. After a simple modification of per°uoroalkysilane, the surface of the macro-film shows excellent superhydrophobicity with a water contact angle of 165.7§2 deg. and sliding angle lower than 3 deg., the prepared superhydrophobic films showing excellent antifouling, self-cleaning and water-repellent functions. The topographic roughness and per°uoroalkysilane modication are found to contribute to the observed superhydrophobicity. Considering the outstanding electronic, chemical and mechanical properties of DWCNTs, it is expected that this multifunctional DWCNTmacrolm has potential applications in many fields.