Preparation method for isodewaxing catalyst

The invention discloses a preparation method for an isodewaxing catalyst. According to the method, a certain amount of alkaline-earth metal soluble salt solution is added during molding of a catalyst carrier to modify the carrier; in the step of loading active metal components, the solvothermal-ion exchange method is adopted, wherein water is replaced with solvent, and the active components are loaded to the catalyst carrier in the mode of ion exchange under certain temperature and pressure conditions. The invention further provides the isodewaxing catalyst prepared through the method. The catalyst is used for isodewaxing lubricating oil distillate and producing lubricant base oil with a low pour point and a high viscosity index, and has the advantages that the acidity of the catalyst is moderate, metal dispersity is high, isodewaxing reactivity and selectivity are high, and the lubricant base oil is low in pour point and high in yield.