<p>In this study, electrical contact materials consisting of Ag/SnO₂@In₂O₃ were successfully prepared by combining the high-energy ball milling method with the reaction synthesis method. Analysis of the microstructure morphology and elemental distribution of the Ag/SnO₂@In₂O₃ materials revealed that the SnO₂@In₂O₃ nanomaterials were structurally intact and surrounded the silver matrix to form a stable composite structure. The Ag/SnO₂(12)@In₂O₃(2) composite powder has a relatively uniform distribution. The phase interface between Ag, In₂O₃, and SnO₂ in the composite powder is tightly bonded without lattice distortion. The In₂O₃ particles are also uniformly encapsulated on the surface of SnO₂, forming a typical "core–shell" structure. Furthermore, the mechanical properties of the Ag/SnO₂@In₂O₃ material significantly improved following recompression and re-sintering (compared to the sintered state), and the electrical conductivity of Ag/SnO₂(12)@In₂O₃(2) increased more significantly. Meanwhile, the electrical contact performance of the material shows that Ag/SnO₂(12)@In₂O₃(2) exhibits not only a small and stable arc energy fluctuation range but also relatively low contact resistance and stable fluctuation. These results elucidate the mechanism by which the microstructure and properties of silver-based electrical contact materials are enhanced through the synergistic regulation of interfacial densification of SnO₂@In₂O₃ prepared by a combination of the high-energy ball milling method and reaction synthesis method with repressing and recombining processes. This provides a basis for developing and designing electrical contact materials.</p>