Objective To study the effect of ultrasonic power on surface morphology and corrosion resistance of deposition. Methods Ultrasonic electro-deposition method in [Bmim] OTf-SiCl4-PC ionic liquid was used to deposit Zinc on the copper electrode surface; electrochemical workstation was used to examine the cathodic polarization curves of plating solution with different ultrasonic power and test the electrodepositing rates of coating; scanning electron microscopy was applied to analyze the surface morphology, micro vickers hardness tester was used to measure the surface hardness, as well as examine the impact of ultrasonic power on the coating performance. Results This research found that the reduction potential of the metal was moved by adding the ultrasound, and the deposition rate of electroless plating was decreased from 4.652 g/(m2·min) to 2.146 g/(m2·min). Ng surface was uniform, compact and strong binding force; the hardness of coating surface from 185HV without ultrasonic increased to 251HV. The corrosion potential of coating was increased from ?1.14 V to ?0.62 V according to Tafel straight line extrapolation method and the corrosion current density was decreased from 8.8 μA/cm2 to 2.3 μA/cm2; the corrosion resistance of coating became better. Conclusion The quality of coating surface is improved remarkably, and roughness of coating is improved gradually. Corrosion resistance performance is raised remarkably. In summary, the best ultrasonic power of ultrasonic electrolytic Zinc plating process is at 120 kW·h.