In order to obtain a NiAl coating with excellent oxidation resistance, NiAlHf coating was prepared on nickel-base superalloy by arc ion plating technology. The arc ion plating technology was used to deposit NiAlHf coating under the parameters of arc current of 110 A and bias voltage of -50 V. The phase structure and morphology of the coating were analyzed by X-ray diffractometer (XRD) and scanning electron microscope (SEM), and the composition of the coating was analyzed by energy spectrometer (EDS). Constant temperature oxidation weight method was adopted to evaluate the high temperature oxidation resistance of the coating. Results show that the NiAlHf coating is dense uniform without obvious holes and other defects. The coating were mainly composed of β-NiAl, and the active element Hf is dissolved in the main phase. The coatings has good high temperature oxidation resistance, the average oxidation rates of NiAlHf coatings after 200 h were 0.0841 g/(m2·h) at constant temperature of 1150 ℃, which is far superior to the traditional MCrAlY coating system. The α-Al2O3 and θ-Al2O3 phase mainly formed at the initial stage of oxidation, then the transition from θ-Al2O3 to the stable α-Al2O3 occurred. Hf is enriched on the coating surface to form HfO2, which forms a pinning effect on the oxide scale, enhances the adhesion of the oxide scale, and improves the oxidation resistance of the coating. With the progress of oxidation, the β-NiAl phase in the coating gradually changed to the γ′-Ni3Al phase. The NiAlHf coating still has excellent oxidation resistance at 1150 ℃, which has a certain guiding role for the development of next advanced protecting coatings, promotion and industrial application of the arc ion plating technology of the NiAl coating.