A parametric study is conducted to evaluate the validity of numerical modeling of discharge plasma in DBD plasma actuator. Discharge plasma behavior is numerically simulated based on the three-fluid plasma model, in which the electron, one type of positive ion and one type of negative ion are taken into account. The simulation results are quantitatively compared with experimental results from the viewpoint of voltage characteristics of thrust force and electric power consumption. The simulation provides the same characteristics as obtained in experiment; the thrust force and electric power consumption increases as a power function of voltage amplitude. However, the simulation cannot reproduce the discharge mode in the case of low voltage amplitude, and it results in quantitative discrepancies between the simulation results and experimental results. It is expected that the simulation successfully reproduces the discharge mode in the case of high voltage amplitude.