MRE zeolite molecular sieve as well as preparation method and application thereof

The invention provides a * MRE zeolite molecular sieve as well as a preparation method and application thereof, and relates to the technical field of molecular sieve preparation. The preparation method of the * MRE zeolite molecular sieve comprises the following steps: mixing an alkali source, a first silicon source, zeolite and water, and carrying out heat treatment to obtain an alkaline precursor solution; mixing the alkaline precursor solution, a second silicon source, an aluminum source and an organic template agent, and crystallizing to obtain the * MRE zeolite molecular sieve, on the basis of SiO2 in the first silicon source and the second silicon source, the total silicon source is the sum of the first silicon source and the second silicon source, and the molar ratio of the organic template agent to the total silicon source is (0.001-0.025): 1. According to the method, the alkaline precursor solution containing the topological structure composition construction unit is prepared firstly, then the alkali