Abstract: In order to have a comprehensive grasp of Cu-Ni-Si-P alloy processing characteristics and guide the industrialization production, cold working characteristics of the Cu-Ni-Si-P alloy were studied. The new Cu-Ni-Si-P alloy recrystallization annealing system through testing the tensile strength and elongation and observing the microstructure of different thickness samples after annealing was determined. The results show that the Cu-Ni-Si-P alloy shows obvious work hardening effect after cold deformation. The strength of the alloy increases at first, then keeps invariant with the working rate increases, the elongation and electrical conductivity exhibits opposite change rule. The greater the deformation degree, the lower of the beginning of the alloy recrystallization temperature. The system of recrystallization annealing temperature of optimized Cu-Ni-Si-P alloy at 80 % working rate is 460 ℃ by 1h.