Abstract: It has been observed that vibration energy of disordered aperiodic structures will be confined to the source in the pass bands. Based on the idea，the localization of a framed cylindrical shell with mass disorderly configurated is studied. To predict the localization factor of a framed cylindrical shell with the mass disorderly configurated，the vibration of the cylindrical shell is analogized to that of a coupled oscillator chain system. With the vibration results obtained by finite element method being the input，the resonance frequency parameter and coupling parameter of the equivalent oscillator chain can be acquired by identification technology combined with wave number analysis. The equivalent mass irregularity parameter can be obtained using reference model identification technology. Localization analysis of two mass disorderly configurated models shows that，the mass irregularity parameter，which is closely related to mass configuration parameter，plays an important role in the localization factor and the mass irregularity parameter. Besides，remarkable localization can be observed in the mass disorderly configurated model when the average configuration value is over 15% of the structural mass.