The pre-annealing-rolling-remelting strain-induced melting activation method was used to prepare semi-solid slurry and back-extrusion to prepare copper alloy bushing parts. The effect of pre-annealing time on the microstructure, hardness, and mechanical properties of copper alloy bushings has studied the law of influence. The results show that the pre-annealing time dramatically influences the structure, mechanical properties, and hardness of the semi-solid copper alloy bushing. After pre-annealing, the Sn content in ZCuSn10P1 copper alloy α-Cu tends to be uniform. Annealing at 700℃ improves the elemental segregation tendency of ZCuSn10P1 copper alloy. With the increase of annealing time, the average grain size of sleeve structure increases, shape factor decreases, and liquid phase ratio decreases; The Brinell hardness of the sleeve decreased, and the tensile strength and extension were increased first and then decreased. The pre-annealing process with better comprehensive properties is 700 ℃ for 2h. At this time, the microstructure uniformity and element distribution of the ZCuSn10P1 copper alloy sleeve are better, and the average grain size of the sleeve is 73.06 μm. The average shape factor is 0.72, tensile strength is 382 MPa, elongation is 5.5%, and average Brinell hardness is 127 HBW.