Abstract: The change rule of interfacial structure and properties of Cu/AlCoCrFeNi_2.1 (Cu/HEAs) laminated ingots under rolling process were studied, and the microstructure, tensile property at room temperature and corrosion resistance of the interface before and after rolling of laminated ingot were analyzed.The results show that during rolling, the amount of rolling deformation affects the microstructure and properties of layered composites.After rolling the, interface of the Cu/AlCoCrFeNi_2.1 composite ingot is well bonded without cracks and other defects.The FCC phase at the interface is separated AlCoCrFeNi_2.1 high entropy alloy entering the copper side.At this time, the FCC phase size decreases with the increase of rolling deformation, the number of FCC phases increases, and the interfacial shear strength increases.As the reduction rate is 40%, the shear strength increases to 90 MPa.Furthermore, it is found that the corrosion resistance of Cu/AlCoCrFeNi_2.1 laminated ingot is improved by rolling.