Abstract: TiAlSiN coating was prepared on the GH4169 alloy surface by cathodic arc ion plating, the morphologies and energy spectra of its surface and interface were analyzed by scanning electron microscopy and energy dispersive spectroscopy, respectively, and the surface roughness was tested by profilometry. Friction and wear test of the coating was performed on a reciprocating friction testing machine, the point energy spectra and plane energy spectra after wear were analyzed by energy dispersive spectroscopy, the friction coefficient and wear property of the coating were studied, and the wear mechanism was discussed. Experimental results show that the structure of the coating surface is compact and the surface roughness is 194.57 nm. The coating is mainly composed of Ti, Al, Si and N elements, and the grains of TiN and AlN are refined by Si atoms. Chemical reactions and mutual diffusion of elements occur in the coating interface, and the combining form is chemical bonding. The average friction coefficient of the coating is 0.493, and the wear form is abrasive wear. The plane scanning results of wear traces indicate that Al and Ti nitrides in the coating decreases after wear, Si and N atoms have no significant reduction, and the increase in wear resistance of the coatings is mainly dependent on the compound formed by Si and N atoms.