The poly-8-hydroxyquinoline was firstly prepared by cyclic voltammetry. The mechanism of polymerization was speculated, and the composition of the polymer film was studied with infrared spectros-copy. Tafel testing was used in order to optimize the treatment for electrodeposition. The result shows that: the best condition of cyclic voltammetry method to synthesize corrosion-resistance polymer film is: the concentration of 8-hydroxyquinoline is 0 . 002 mol / L, sodium hydroxide is 0 . 4 mol / L, the scan rate is 30 mV / s, and scan 8 laps. A bright and smooth yellow film is obtained and the corrosion-resistance performance of the nickel plating work piece processes under the optimized condition was improved significantly.