Catalyst for preparing methanol as well as preparation method and application of catalyst

The invention relates to the field of catalysts, and discloses a catalyst for preparing methanol as well as a preparation method and application thereof. The catalyst for preparing the methanol contains Cu, CeO2 and Al2O3. The preparation method of the catalyst for preparing methanol comprises the following steps: (1) mixing a Cu precursor, a Ce precursor, an Al precursor and water to obtain a mixed solution, adjusting the pH value of the mixed solution to 8-10, carrying out a reaction, and then carrying out solid-liquid separation; (2) drying and calcining the solid-phase intermediate material obtained in the step (1); (3) crushing and sieving the material obtained in the step (2), wherein the particle size of the sieved material is 20-40 meshes; and (4) mixing hydrogen and the material obtained in the step (3), and then carrying out reduction reaction. The catalyst for preparing methanol is high in carbon dioxide conversion rate and methanol selectivity in the reaction of preparing methanol through carbon d