Catalyst for preparing propylene and aromatic hydrocarbons by converting methanol, and preparation method and use thereof

The invention relates to a catalyst for preparing propylene and aromatic hydrocarbons by converting methanol, and a preparation method thereof. The problems of fast inactivation and low yield of propylene and aromatic hydrocarbons of present catalysts in the process for preparing propylene by converting methanol are mainly solved. The catalyst comprises 20-90% of ZSM-5 molecular sieve with the shape index of 3-100 (the shape index is defined as a length ratio of a longest edge to a shortest edge of a molecular sieve crystal in a three dimensional direction), 0.05-3% of a transition metal oxide and 18-69% of a binder. The catalyst provided by the invention well solves the problems, and can be used in the industrial production for preparing propylene and aromatic hydrocarbons by using methanol.