High entropy alloys (HEAs) have attracted much attention due to their unique properties, which include high mechanical strength, corrosion resistance, and stability at high temperatures. Among the production methods of high entropy alloys, the vacuum remelting casting method (VAR) is of great importance due to the control of the melting process and rapid solidification of the melt. The aim of this research is to make a microstructure with uniform chemical composition of high entropy CuNiAlCrFe alloy with suitable mechanical and thermal properties using VAR casting method. After preparing CuNiAlCrFe high entropy alloy ingot by VAR casting method, XRD, EDX analyzes and also Map images of the alloy composition were prepared to verify the made alloy. The light microscope images showed the dendritic structure of the alloy due to rapid freezing and confirmed the biphasic nature of the high entropy alloy. Next, in order to characterize the physical properties of the high entropy alloy, DSC and TG thermal analysis were taken. The results of thermal analysis showed that the melting point of the high entropy CuNiAlCrFe alloy is 1360 oC, and no mass change was observed during the process up to the above temperature. During the process of studying the above-mentioned high entropy alloy, samples were taken to check mechanical tests such as tensile, average hardness and microhardness, and the results obtained were final strength 3000 MPa, HV30577, (rich in iron phase) HV30 160 and ( copper rich phase) were 125 HV30