Abstract: To improve the utilization efficiency of indium and enhance the catalytic performance of Pt/In₂O₃ for CO₂ hydrogenation, a hierarchically structured Pt/In₂O₃/ZnO catalyst was constructed by sequentially loading In₂O₃ and Pt nanoparticles onto a ZnO support. The effect of In₂O₃ content on the catalytic performance was systematically investigated, and its loading ratio was optimized. The results show that when the In₂O₃ loading is 30%, the catalyst exhibits a structure in which ZnO is encapsulated by In₂O₃, with Pt nanoparticles highly dispersed on the surface. Over this optimized catalyst, the CO₂ conversion and methanol yield reach 12.4% and 5.6%, respectively, representing an improvement of nearly 25% compared to those of the Pt/In₂O₃ catalyst (9.5% and 4.2%). Chemisorption analysis further confirms that the Pt nanoparticles primarily interact with In₂O₃, and the decrease in CO₂ desorption temperature indicates that ZnO effectively lowers the activation temperature of CO₂, thereby significantly enhancing the catalytic performance.