Abstract: In this study, selective dealumination of Beta zeolites was performed through partially removing the templating agent in Beta zeolites by calcination and then removing the aluminum on the external surface of Beta zeolites with acid treatment. Hydrocracking catalysts were prepared by loading WO3 onto these dealuminated Beta zeolites. It was shown that the surface SiO2/Al2O3 of selectively dealuminated Beta zeolites was higher than that of conventionally dealuminated samples for the same bulk SiO2/Al2O3, and the hydrogenation activity of the catalyst of the selectively dealuminated Beta zeolites was lower than that of conventionally dealuminated Beta zeolites. The experimental results for tetralin hydrocracking to BTX showed that the catalysts based on the selectively dealuminated Beta zeolites had higher BTX selectivity and lower coke formation rate than that the catalysts based on the conventionally dealuminated Beta zeolites.