HZSM-5 molecular sieve as well as preparation method and application thereof

The invention relates to an HZSM5 molecular sieve as well as a preparation method and application thereof. The method comprises the following steps of: (1) mixing water, a silicon source and an alkalisource to obtain a solution A, mixing ethanol, seed crystals and an aluminum source to obtain a solution B; and (2) uniformly mixing the solution B and the solution A, and then carrying out crystallization reaction. The silicon source is metered on the basis of silicon dioxide, and the molar ratio of the ethanol to the silicon source is 0.5-2.5: 1. According to the HZSM-5 molecular sieve as wellas the preparation method and application thereof, the HZSM-5 molecular sieve with high crystallinity is obtained through a one-step crystallization method by adopting the ethanol as a template agentand controlling the use amounts of the ethanol and the silicon source within a specific range, so that the synthesis process of the HZSM-5 molecular sieve is simplified, the synthesis cost is reduced,no waste liquid is generated, and the method is environmentally friendly and has a wide application prospect.