The flutter suppression for a highaspectratio(HAR) wing with two control surfaces was presented. The flexible wing was modeled as a cantilever beam, including bendingtorsional deformation. The aeroelastic equations in state space of HAR wing were established by using strip theory. The modeling error was considered by introducting some uncertain parameters in the aeroelastic equations of motion. Base on robust μ control method, the flutter suppression of the HAR wing was studied. Numerical simulation results show that μ controller can quickly stabilize the vibration of the HAR wing, and two control surfaces work better than a single control surface.