Abstract: Ni44Cr25Fe20Co5Al3Ti3 high-entropy alloy was prepared by vacuum arc smelting. The alloy was dissolved at 1050℃ and aged heat treatment at 800 ℃. X-ray diffraction（XRD）, optical microscope（OM） and universal testing machine were used to study the microstructure and tensile mechanical properties of the alloy after solid solution and aging. The results show that, compared with the solid solution state, the yield strength and tensile strength of Ni44Cr25Fe20Co5Al3Ti3 high-entropy alloy are significantly increased after aging, but have little effect on the ductility. The tensile yield strength and tensile strength are about 170 MPa and 250 MPa at room temperature, respectively, and the elongation is 17.5%. After aging at 800 ℃, the tensile yield strength and tensile strength at room temperature are about 700 MPa and 870 MPa, respectively, and the elongation is 12%. The correlation between precipitated phase and mechanical behavior can be used as a typical example of precipitated enhanced high entropy alloy and provide reference for the design of high entropy alloy composition.