This paper demonstrates broadband and wide-temperature-range thermal emitter with superhydrophobicity based on an oxidized high-entropy film. The annealed (NiCuCrFeSi)O highentropy film can serve as a mid-infrared emitter due to its three characteristics: i) High blackbodylike emission in a broadband mid-infrared region from 2.5 μm to 20 μm; ii) High emittance (more than 90%) in a wide temperature range from 300 K to 1000 K; iii) Super-hydrophobicity with high contact angle (CA) of 151 and low title angle (TA) of 5. These characteristics originate from the recrystallization of as-deposited film and formation of cavernous structure with a plethora of nanoscale polyhedrons and holes after an annealing process, supported by the results of XRD and SEM/EDX. This work may provide new ideas for applications of thermal emitters operating at substantially wide temperature range.