Abstract: Actuator disk method (ADM) has been proved to be able to achieve rapid and accurate analysis of the effects of propeller slipstream on high-lift configurations. This paper employed the unsteady and steady ADM to conduct numerical simulations investigating the impact of propeller slipstream on high-lift configurations with two different advance ratios and an angle of attack (AOA) ranging from –4° to 24°. Despite disparities in the time-averaged load distributions of an excitation disk obtained from either an isolated propeller or a propeller integrated into a high-lift configuration, applying these loads from different sources results in fundamentally similar pressure distributions and lift and drag coefficients. Moreover, by transforming unsteady computations into steady ones, the obtained surface pressure distributions, lift, and drag coefficients were consistent with the results from the unsteady method. Overall, the results indicate that ADM can efficiently and reasonably evaluate the impact of propeller slipstream on high-lift configurations.