Preparation method of high-conductivity dispersion-strengthened copper alloy bar cold-rolled plate strip

A preparation method of a high-conductivity dispersion-strengthened copper alloy bar cold-rolled plate strip comprises the steps that a dispersion copper powder ingot with the Al2O3 content being 0.01-0.30 wt% and the balance being Cu is prepared in advance through a dispersion copper short-process internal oxidation preparation technology, then hot extrusion is carried out, a dispersion oxygen-free copper bar blank is extruded, the dispersion oxygen-free copper bar blank is directly cold-rolled to the thickness of 15 mm, face milling is carried out, then rolling is carried out for the specification of 0.5 mm-5 mm or below 5 mm, one-time inert protective annealing is carried out at the position of 5 mm, and the thickness of the dispersion oxygen-free copper bar blank is 5 mm or below. Performing cold rolling to reach a corresponding specification; according to the method, the processing technology of the dispersion copper alloy is simplified, the processing flow and the production period are shortened, the pr