The invention provides copper wires with super high tension and a preparation method thereof, wherein, the method includes the following steps: (1) preparing Cu-AI master alloy bars with the AI content of 0.1-0.63wt%; (2) carrying out cold rolling treatment for the Cu-AI master alloy bars; (3) drawing the Cu-AI master alloy bars to obtain Cu-Ai alloy wires with a stated diameter; (4) carrying out internal oxidation treatment for the Cu-AI alloy wires to obtain alloy wires of Cu-Al2O3 with the basic content of Al2O3 as 0.2-1.2wt%; (5) drawing the alloy wires of Cu-Al2O3 to obtain the copper wires with super high tension having a required diameter. The copper wires with super high tension prepared by the method have good conductivity as well as high tensile strength and softening temperature. Thus the copper wires are applicable for advanced digital communications devices, high fidelity wires and voice coils, and water cooling copper wires or connectors used in ultra-high magnetic fields. The invention applies the method in which the entire Cu-Ai alloy wires are treated by internal oxidation to prepare wires with super high tension of dispersion strengthening copper alloy of Al2O3, and the invention opens up a new pass for the production of copper alloy wires with high conductivity and high tension in our country.