The Beta zeolite produced by means of a template agent based hydrothermal crystallization method is featured with high relative crystallinity ,wherein the relative crystallinity is no less than 80%,the SiO2/Al2O3 molar ration is no less than 25, the Na2O is no more than 0.1%,the BET specific surface is no less than 580m2/g,and the average grain size is 300nm.