This paper presents a non-dimensional parameter η, which is ratio of kinetic energy of actuator jet flow and electric energy, to characterize energy efficiency of synthetic jet actuator for dual-pole spark plasma synthetic jet actuator. Velocity of jet flow is measured by Pitot tube and electric energy is measured by dynamometer during the experiment. The variation rule of energy efficiency factor η can be summarized through observation and study on the impact of electric parameter and electrode spacing on jet velocity and power. This research finding is reviewed as a reference for further study on applies of spark discharge plasma Synthetic Jet.