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.