Beta molecular sieve has strong acidity and unique three-dimensional pore structure, and has higher thermal stability and hydrothermal stability than Y-type molecular sieve.Beta molecular sieves are widely used in the fields of NOx selective catalytic reduction, catalytic cracking, hydrofining, hydroisomerization, alkylation, esterification, aromatics disproportionation, macromolecular methyl naphthalene disproportionation and alcohol amination.