Abstract: The transfer matrix model of the mistuned bladed disk was constituted in the state space.The effects of mistuning parameters on robust performance of mistuned bladed were evaluated using the structured singular value(SSV) of the mistuned transfer matrix.The robust performance of a simplified bladed disk model with two-degree-of-freedom per sector was analyzed.The influences of excitation order,damping,mistuning strength and intentional mistuning on the robust performance of the system were also considered.The numerical results indicate that,the robust performance of the mistuned bladed disk could be effectively enhanced by increasing the system damping,keeping the mistuning strength beyond the threshold value,and by introducing some appropriate intentional mistuning to the system.