Abstarct: Abstract High speed steel (HSS) is a subset of tool steels that are used to make cutting and machining tools. Hard ceramic coatings made of mextal nitrides can increase the range of their application by increasing the life of tools. In order to reduce the coefficient of friction and the amount of wear of tools and parts, deposition of multilxayer hard coating using physical vapor deposition (PVD) methods is a good suggestion. .In this research, CrN/CrAlN ceramic multi-laxyer coatings were applied on high-speed steel mextal samples using the cathodic arc physical vapor deposition process (cathodic arc-PVD). X-ray diffraction (XRD) analysis, field emission scanning electron microscope (FE-SEM) equipped with MAP and EDS, atomic force microscope (AFM) were used to investigate the microstructure. Also, nanohardness and nanoscratch tests were used to evaluate mechanical properties. Then, the wear test pin on disk was used to check the tribological behavior and the polarization and electrochemical impedance test were used to check the corrosion behavior. The results of FE-SEM analysis determine the microstructure, thickness and composition of the coating and XRD test determine the crystalline properties and phasing of the coating. According to the result of AFM surface topography, the surface roughness (Ra) of the sanded steel substrate increased from 11.97 nm to 53.47 nm after coating. Nano hardness showed that the hardness of the substrate increased from 3 GPa to 10.2 GPa and its Young's constant decreased from 374 GPa to 264 GPa. By examining the results of the nanoscratch test, it can be seen that the coating has high scratch resistance and adhesion strength compared to the substrate. The wear rate for the coated sample compared to the raw steel substrate under a load of 5 newtons decreased from 0.007 µg/N.cm to 0.002 µg/N.cm and the friction coefficient decreased from about 0.6 to 0.3. The corrosion current density for the uncoated high-speed steel sample was about 4.5 μA/cm2, which was reduced to 1.8 μA/cm2 by applying the coating, and the corrosion potential values increased from -638 mV to -438 mV, It shows the improvement of corrosion resistance. Examining the findings of different analyzes of this research leads to the selection of CrN/CrAlN as a suitable coating for protecting high-speed steel samples and increasing the life of tools made of this type of steel.