The invention relates to a high-conductivity hard aluminum conductor and a production method thereof. The production method comprises the following steps: using 99.7% of industrial pure aluminum in production of the high-conductivity hard aluminum conductor on the basis of boronizing and rare earth treatment, and meanwhile smelting by controlling the mass ratio of Fe/Si and the mass ratio of Si/Sb, wherein the mass ratio of Fe/Si is 3.54-5.26, and the mass ratio of Si/Sb is 13-22; and while adding Sb, blowing molten and diluted intermediate alloy melt to the surface of a furnace body by using inert gas, rapidly stirring for 5-15 minutes, and then beginning to carry out pouring. The L4 conductor is produced by 99.7% of the industrial pure aluminum, so that costs for raw materials can be greatly reduced, and market competitiveness is improved. The L4 conductor is produced by 99.7% of the industrial pure aluminum through micro-alloying smelting. The conductivity of the high-conductivity hard aluminum conductor is not lower than 63% IACS, and the strength is not lower than 161 MPa.