The rapid development of global industry had aggravated a large amount of greenhouse gas （CO₂）emissions.It is of great significance to convert CO₂ to methanol by reduction and activation of high energy hydrogen molecules.Wet chemical co-precipitation strategy was employed to fabricate the MnZnO_x solid solution catalyst which realized the hydrogenation of CO₂ to methanol and the influence of calcination temperature on physicochemical properties and catalytic performance of the catalysts were fully investigated in this paper.X-ray diffraction（XRD）,X-ray photoelectron spectroscopy（XPS）,N₂ adsorptiondesorption,CO₂-TPD and H₂-TPR techniques were used to characterize the physicochemical properties of the catalysts calcined at various temperature.The results showed that the calcination temperature had significant impact on the crystalline phase compositions,pore structure properties,CO₂ adsorption characteristics and surface oxygen vacancy concentrations of MnZnO_x.Although the homogeneous solid solution structure could be formed at lower temperature,the crystallinity of the main crystal phase ZnO was inferior.Too high calcination temperature made the solute component Mn_xO_y crystallize in the form of Mn₃O₄ and the mixed crystal phase of Mn₃O₄ and ZnO was formed in the structure,resulting in the decrease of specific surface area and mesoporous pore volume.MnZnO_x catalyst calcinated at 500 ℃ had a solid solution structure with abundant surface oxygen vacancy,large CO₂ adsorption and mesoporous pore volume and uniform dispersion of solute components.Under the conditions as follows：reaction pressure of 3.0 MPa,reaction space velocity（GHSV） of 14 400 mL/（g·h） and V（H₂）∶V（CO₂）∶V（N₂）=72∶24∶4,the MnZnO_x at 380 ℃ exhibited excellent catalytic performance with methanol selectivity of 86.1%,CO₂ conversion of 16.0% and methanol STY of 0.68 g MeOH/（h·g_cat）.