Flying-wing unmanned aerial vehicles can use active flow control technology to replace traditional control surfaces,avoiding radar echoes generated by control surface deflection,and can achieve better stealth performance.This article proposes a joint optimization method for high aspect ratio flying-wing unmanned aerial vehicles loaded with circulation controllers,which considers both aerodynamic and stealth performance.A joint optimization framework based on surrogate model is established for the two-dimensional airfoil containing circulation control(CC)mechanism,and the Pareto frontier solution set is obtained through optimization solution.The aerodynamic and stealth performance of the two-dimensional airfoil corresponding to three points in the Pareto front is evaluated,and the numerical results confirm the feasibility of the joint optimization method proposed in this paper.