The work aims to study friction and wear properties of chromium doped diamond-like carbon (Cr-DLC) films, chromium aluminum nitride (CrAlN) films and chromium nitride (CrN) films prepared on the surface of GNiCr40Al3Ti alloy in deionized water environment. Cr-DLC films were prepared on GNiCr40Al3Ti alloy in the method of ion source assisted unbalanced magnetron sputtering. CrAlN films and CrN films were prepared by multi-arc ion plating technique. The microstructure and morphology of films were analyzed by scanning electron microscope, Raman spectrometer and X-ray diffractometer. The hardness, friction and wear properties and two-dimensional profile curves of wear scar of the films were tested by microhardness tester, tribo-tester as well as white light interference scanning profiler. In the 10 h continuous friction process of deionized water environment, the CrN films had the lowest average friction coefficient of only 0.17, which was 54% lower than that of the GNiCr40Al3Ti alloy. Compared with GNiCr40Al3Ti alloy, Cr-DLC films, CrAlN films and CrN films reduced wear volume under deionized water environment. The CrN films exhibited the best wear resistance with wear volume of 0.017 mm3, which was only 0.18% of the wear volume of the GNiCr40Al3Ti alloy. The wear resistance of Cr-DLC films and CrAlN films were not as good as that of CrN films, which was mainly caused by the microstructure of the films. The columnar loose structure of the Cr-DLC film caused the film to be worn through prematurely, and the Cr phase in the CrAlN film caused the hardness of the film to decrease, thereby reducing the ability to resist shear. CrN films have the lowest friction coefficient and the best wear resistance in deionized water environment.