Composite molecular sieve catalyst for preparation of gasoline from methanol and preparation method thereof

The present invention provides a composite molecular sieve catalyst for preparation of gasoline from methanol and a preparation method thereof. The method is as follows: ZSM-5 molecular sieve and NaY molecular sieve are added into a tetrapropyl quaternary ammonium salt and inorganic base mixed aqueous alkali solution for high-temperature reaction, filtration and roasting to make a much-level molecular sieve, and the composite molecular sieve catalyst can be obtained by hydrogen type replacement of the much-level molecular sieve and an ammonium nitrate solution and extruding forming with a binder which is added with a strength aid. The preparation method is simple and low- cost, and the catalyst for the reaction of preparation of gasoline from methanol has high gasoline yield, high catalyst mechanical strength, long life and other advantages.