Soil structure is fundamental to the maintenance of terrestrial ecosystems, affecting hydrological processes, nitrogen cycling, the activity of microbes, and agricultural output. The deterioration, frequently caused by intensive agriculture, compaction, and inadequate land management, leads to decreased soil fertility, erosion, and weakened climatic resistance. Traditional additions, including compost, lime, and gypsum, have been utilized to rectify soil degradation. Nevertheless, these conventional solutions demonstrate several limitations, such as substantial volume needs, variable efficacy, temporary advantages, and possible environmental repercussions. This chapter examines the utilization of nanotechnology as a viable solution for improving soil structure via physicochemical and biological processes. Nanoparticles, due to their nanoscale dimensions, extensive surface area, and adjustable surface chemistry, demonstrate distinctive interactions with soil components. Nanoparticles promote soil structure through methods such as promoting aggregate formation, increasing porosity, improving water retention, and stabilizing organic matter. Furthermore, nanoparticles influence chemical parameters, including capacity for cation exchange and pH, while concurrently promoting advantageous microbial populations and enzymatic activity. Substances such as nano-silica, nano-clays, nano-iron oxides, and nano-biochar are effective in enhancing soil physical structure and biological activity. This chapter further contrasts traditional and nanoparticle-based changes, objectively evaluating their respective advantages and limits. This study highlights the potential of nanotechnology for developing sustainable and resilient soil management systems through the combination of current research and mechanistic insights. It underscores the necessity for interdisciplinary methodologies to evaluate long-term effects, improve nanoparticle compositions, and incorporate these technologies into functional agricultural systems.