The invention provides a copper alloy material for a large-expanded-hole shaped charge liner and a preparation method thereof. Copper powder, zinc powder and aluminum powder are adopted as raw materials, powder-compacting sintering smelting is adopted, vacuum electron-beam smelting is adopted, and the vacuum degree is not lower than 2*10<-3> Pa. The density of the prepared copper alloy material is6-7 g/cm3, the ductility is high, and compared with a traditional pure-copper shaped charge liner material, the high penetration depth is kept, the diameter of expanded holes is enlarged, and penetration power of the shaped charge liner is improved.