To study the performance of pure aluminium (Al) oxide film produced by high-speed wire electrical discharge machining (WEDM-HS), some characterisation indices including phase composition, surface morphology characteristics, roughness, friction coefficient, oxide content and thickness of the 1060 Al oxide film are researched, respectively, through X-ray diffraction, energy dispersive X-ray spectroscopy, scanning electron microscope, confocal microscope, contourgraph and nanoindentation. The results show that the produced oxide film of 1060 Al is mainly composed of Al2O3 phase after the 1060 Al sample processed by WEDM-HS. With the pulse width of WEDM-HS is gradually decreasing, the Al2O3 content values in the oxide film are all more than 84% with slight change. The surface morphology of the oxide film is made up of honeycomb holes of microns size. Moreover, the ladder-like microstructures of square bracket are found for the first time at the inside wall from bottom to top of the microholes. With the decreasing of the pulse width, the thickness and the friction coefficient of the oxide film first decrease, then increase and finally tend to be stable. They both have certain relationships with the Al2O3 content of the oxide film.