In this study, Fe and Al were used as joint variables for fine tuning, and the effects of the common changes of Fe and Al on the phase structure, microstructure, compression properties, hardness and friction properties of Fe_(2-x)CrMnAl_xCu (x=1.3, 1.4, 1.5, 1.6, 1.7) high entropy alloy were detected and analyzed. The experimental results show that the interdendrite and dendrite structure of Fe_(2-x)CrMnAl_xCu high entropy alloy are composed of bcc phase, and the ordered BCC phase and FeAl phase precipitates are precipitated inside the dendrite, and the content of precipitates increases slightly with the decrease of Fe content and the increase of Al content. The hardness of Fe_(2-x)CrMnAl_xCu high entropy alloy keeps increasing. When x=1.6, the comprehensive performance of high entropy alloy reaches the best, with the hardness up to 558.5 HV, the yield strength 1205.43 MPa, the compressive strength 1431.52 MPa and the deformation rate 9.06%. In addition, with the decrease of Fe content and the increase of Al content, the segregation of elements in high entropy alloy is alleviated to a certain extent.