Copper electrolyte purification and waste acid synergistic resourceful treatment method

The invention discloses a copper electrolyte purification and waste acid synergetic resourceful treatment method, which specifically comprises the following steps: freezing and crystallizing waste acid, mixing lime neutralized liquid with residual liquid obtained after diffusion dialysis of waste electrolyte, adding alkali for neutralization, reducing, freezing and crystallizing, and the like, so that arsenic in the waste acid is synergistically removed by utilizing residual copper in the waste electrolyte, arsenic is recovered in the form of As2O3, and alkali is further added into the filtrate to neutralize and precipitate nickel hydroxide. The potential safety hazard problem of hydrogen sulfide in sulfuration arsenic removal is solved, the defects in the prior art are overcome, and a good working environment is provided; the problem of stockpiling of hazardous waste arsenic sulfide slag in a sulfuration arsenic removal method is solved; and waste is treated by waste, and copper in the waste electrolyte is r