High velocity air fuel technique has lower temperature than High velocity oxygen fuel technique during spray process. Moreover, the spray powders performs better oxidation resistance during HVAF spraying process which finally formed a coating with dense structure and high bond strength. In this paper, mechanical ball milling of the mixture of NiCr and NiCr-75%Cr3C2 powders were taken to get the NiCr-50%Cr3C2 powders. Then, two coatings were sprayed on the surface of CrZrCu alloy using NiCr-50%Cr3C2 powders with and without NiCr interlayer by HVAF. The phase and microstructures of the coatings were characterized by XRD, OM and SEM; the mechanical properties were calculated by Pin-on-Disk, Vicker hardness test, Porosity test and Tensile test. The results show that the different plastic deformation of various particles of mechanical mixed powders in spray process result in high porosity. And the bond strength of the coating with NiCr interlayer could reach 60MPa, but the coating performs little worse in hardness and wear resistance. After 500℃ annealing treatment, the composite coating with NiCr interlayer showed the higher mechanical properties which was ascribed to the inter-diffusion between the working layer to interlayer.