Tetraethoxysilane modified datolite molecular sieve and preparation method and application thereof

A preparation method of a tetraethoxysilane modified datolite molecular sieve is characterized by comprising the following steps of 1 mixing the tetraethoxysilane and organic solvent; 2 mixing coacervate B-ZSM-5 molecular sieve with the datolite molar ratio of 3-100 and the grain size of 70-100 nm and the solution obtained in the step 1, wherin the mass percentage of the B-ZSM-5 molecular sieve and the tetraethoxysilane is 3%-33%; and 3 soaking for 2hours at room temperature. By means of the method of modified the tetraethoxysilaneb, a souring centre can be greatly adjusted, orifice and duct structures can be decorated, and activity and stability of a catalytic agent can be improved.