The invention relates to a method for forming the surface of a high-purity aluminum wire through multi-time electrifying, and belongs to the technical field of capacitor lead-out wires. The method comprises the following steps: one end of the high-purity aluminum wire with the surface being clean and dry is connected with an anode of a power supply, the other end of the high-purity aluminum wire is connected with a cathode of the power supply, and then the high-purity aluminum wire is placed in forming liquid; after forming for 45-55 min under a voltage of 220 V and a current of 3-6 A, currentintroduction is stopped; the high-purity aluminum wire is washed; the high-purity aluminum wire is transferred into deionized water, and the current is introduced for 2-3 min under the voltage of 220V again; then glucose is added into the deionized water; the temperature is increased to be 55-60 DEG C, and under the condition of electrifying, heat preservation is conducted for 2-5 min; and electrifying is stopped, the high-purity aluminum wire is washed and dried, and then a finished product is obtained.