Abstract: A robust airfoil optimization platform was constructed based on modified particle swarm optimization method(i.e.second-order oscillating particle swarm method),which consists of an efficient optimization algorithm,a precise aero dynamic analysis program,a highac-curacy surrogate model and a classical airfoil parametric method.There are two improvements for the modified particle swarm method compared to standard particle swarm method.Firstly,particle velocity was represented by the combination of particle position and variation of position,which makes the particle swarm algorithm become a second-order precision method with respect to particle position.Secondly,for the sake of adding diversity to the swarm and enlarging parameter searching domain to improve the global convergence performance of the algorithm,an oscillating term was introduced to the update formula of particle velocity.At last,taking two airfoils as examples,the aerodynamic shapes were optimized on this optimization platform.It is shown from the optimization results that the aerodynamic characteristic of the airfoils was greatly improved at a broad design range.