A series of Mo-impregnated H%β% samples, with MoO-3 loading in H%β% zeolite in the mass fraction range of 0^5%_6^0%, were studied by means of XRD and IR in order to characterize their structures. Mo/H%β% samples′ crystallinity almost linearly decreases with increasing the amount of MoO-3 loaded. The IR spectra and XRD patterns suggest that the progressive destabilization of the H%β% zeolite structure is caused by increasing Mo loading in (MoO-3+H%β% zeolite). During the calcination, Al-2(MoO-4)-3 formed from the dealumination of H%β% zeolite, causes the substantially partial breakdown of the zeolite framework when the Mo loading in MoO-3+H%β% is relatively high. A series of Mo-impregnated H % β % samples, with MoO - 3 loading in H % β % zeolite in the mass fraction range of 0 ^ 5% _ 6 ^ 0%, were studied by means of XRD and IR in order to characterize their structures. Mo / H % β % samples’ crystallinity almost linearly decreases with increasing the amount of MoO - 3 loaded. The IR spectra and the XRD patterns suggest that progressive destabilization of the H % β % zeolite structure is caused by increasing Mo loading in (MoO - 3 + H % β % zeolite) - 2 (MoO - 4) - 3 formed from the dealumination of H % β % zeolite, causes the partial partial failure of the zeolite framework when the Mo loading in MoO - 3+ H % β % is relatively high.