Aimed at force fighting phenomenon in action-action force combination configured of the certain aircraft control surface drive system，the resolution with cross-channel force equilibrium methodology was exploited, according to project，the mitigation effect of the methodology under different discrepant signals influence was simulated in AMESim software，the simulation result of reveals correctness dang effectiveness of the equilibrium methodology， the simulation result reveals that the resolution not only mitigates force fight in parallel drive system effectually，but also was the optimal force fight mitigation plan。