NiFeCr/NiFe/Ta films with excellent performance were prepared by magnetron sputtering system.The anisotropic magetoresistance (AMR) value (△R/R) and magnetic filed sensitivity (Sv,Sv=[d(△R/R)/dH]max.) for the 12 nm NiFe film deposited on NiFeCr buffer layer were 3.66％ and 1.42 × 10-4 ％T-1,respectively.The higher Sv of the film is close to that of a spin valve (SV).The microstructure analysis shows that the NiFeCr buffer layer has adopted the same structure with the same interplanar distance as the NiFe layer,inducing a strong NiFe (111) texture,and that the NiFeCr/NiFe interface is quite smooth,leading to a high degree of specular reflection of conduction electrons.Both increase the △R and reduce the R in the film,which lead to the high △R/R.Clean substrate surfaces are critical for preparation of high performance NiFeCr/NiFe/Ta films,and sputter cleaning or pre-deposition of 5 nm amorphous A12O3 layer in the deposition chamber can provide the required clean substrate surfaces for the growth of the buffer layer.