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Durable superhydrophobic aluminum alloy surfaces were prepared through a facile method: combining high-speed wire electrical discharge machining and chemical modification. Three types of pulse width were selected to machine the aluminum alloy surfaces with different levels of surface roughness. The effect of immersion time in perfluorooctanoic acid on the wettability of the aluminum alloy surfaces was examined. The contact angle of the superhydrophobic aluminum alloy surfaces was 1 5 9. 7 ± 3 ∘ , and the sliding angle was 1 ± 0. 5 ∘ . After sanding with coarse sandpaper, the aluminum alloy surfaces still exhibited superhydrophobicity with a stroke of 450 cm, indicating good mechanical durability. The prepared superhydrophobic aluminum alloy surface heated for 2 h within the 190–240∘C temperature range showed favorable thermal stability. In addition, the superhydrophobic aluminum alloy surface exhibited self-cleaning property. Therefore, the superhydrophobic aluminum alloy surface prepared by using the simple mass production method showed good mechanical stability, thermal stability, and self-cleaning property, as well as broad application potential. Superhydrophobic Al alloy surfaces were successfully prepared by HS-WEDM and chemical modification, with a CA of 159.7 ± 3∘ and a SA of 1 ± 0.5∘. The as-prepared superhydrophobic Al surface shows good mechanical durability because of the protection coming from the rough peaks. After being heated at 240∘C for 2 h, the superhydrophobic Al surface still had a CA of 153 ± 0.6∘ and a SA of 7∘ ± 0.8∘, indicating its satisfactory thermal stability. [ABSTRACT FROM AUTHOR]