Copper smelting electric dust originates from the smelter off-gas generated in the process of complex copper concentrate smelting. If the copper smelting electric dust is directly returned to the smelting furnace, the impurity elements will be accumulated and a significant impact on the final product will be caused; moreover, serious environmental pollution will be occurred if they are cumulated and stored directly. Therefore, a comprehensive recovery and treatment technology for copper smelting electric dust is urgently needed. Taking the copper smelting electric dust as the research object, under the conditions of the temperature of 80 ℃ and the acidity of 80 g/L, an acid leaching of the copper smelting electric dust is conducted for 2 h, and then the leaching rates of Cu, Zn and As can reach 95.6%, 97.8%, and 94.5% respectively. After the zinc power in a molar ratio of 1.2:1 (Zn:Cu) is added, a sponge copper with a Cu content of more than 90% can be obtained. After adjusting and replacing with zinc oxide powder, the pH of the solution is equal to 2.5, and then iron sulfate is added to remove As in a molar ratio of 1.1:1 (Fe:As); the As content in the solution after removing As is less than 30 mg/L. After that, air is injected into the solution and zinc oxide powder is added to adjust pH=4.5, the zinc sulfate solution with a Fe content of less than 20 mg/L can be obtained. At last, taking the zinc sulfate solution as raw material, metal Zn can be obtained after electrodeposition.