High-strength and high-conductivity copper alloy plate strip and preparation method thereof

The invention discloses a high-strength and high-conductivity copper alloy plate strip and a preparation method thereof, and belongs to the technical field of non-ferrous metal alloys, and the preparation method comprises the following steps: S1, burdening: preparing raw materials; s2, smelting: melting the raw materials; s3, casting: casting the melt; s4, hot rolling: carrying out hot rolling on the cast ingot; s5, solid solution is conducted, specifically, solid solution is conducted on the hot-rolled blank; s6, surface milling is conducted, specifically, oxide skin on the surface of the solid solution blank is removed; s7, primary rolling is conducted, specifically, the blank obtained after face milling is subjected to primary rolling; s8, annealing is conducted, specifically, annealing treatment is conducted on the blooming plate strip; s9, finish rolling is conducted, specifically, finish rolling is conducted on the annealed plate strip; s10, annealing is conducted, specifically, the finish-rolled plate