AlN and equimolar ratio of gas atomized CoCrFeMnNi HEA powders were used to prepare AlN–CoCrFeMnNi cermets by ball milling followed by hot pressing sintering at 1240 °C for 2 h. The microstructure characteristics and electrical properties of the cermets were investigated. The sintered cermet bulks were composed of a FCC-structured CoCrFeMnNi solid solution binder phase, AlN phase, and a small amount of Cr 7 C 3 type carbide. No obvious interfacial reaction occurred between AlN and CoCrFeMnNi HEA. The resistivity of AlN–CoCrFeMnNi cermets nonlinearly increased with increasing AlN content and temperature. A conductivity model of AlN–CoCrFeMnNi cermets at room temperature and 600 o C was established based on the generalized effective medium (GEM) equation. Results indicated that AlN–CoCrFeMnNi cermets had a typical percolation threshold phenomenon, which allowed to continuously regulate their resistivity between 10 2 μΩ cm to 10 3 μΩ cm as AlN was in the range of 10–50 wt% under room temperature. Therefore, the AlN–CoCrFeMnNi cermets are promising materials for applications in the e-cigarette field.