An optimization method for the circular microphone array configuration is presented.Firstly

an object function is formed by comprising the main lobe width and the max side lode gain.Secondly

the circular array plane is divided into some 1 cm×1 cm squares equally

and the microphones can only be located in the middle of these squares exactly in order to keep the optimized configuration realizable.Thirdly

the solutions to selection

crossover and mutation are designed to assure the algorithm feasible.Simulation result show that the optimized algorithm can obtain appropriate array configuration.The optimized configuration of microphone array has advantage on controlling main lobe width and maximum gain of side lobes.