<p>Existing studies have mostly focused on sustainable intensification (SI) in agricultural systems, while neglecting the integrated analysis of SI for the land space utilization system (LSUS). This has resulted in a lack of systematic solutions in balancing sustainable resource utilization and environmental protection. This study reviewed SI’s conceptual framework and evaluation, identified the gaps, and proposed an analytical framework of SI with clear logic and modeling processes for LSUS. Key findings include: (1) Resource competition and ecosystem pressures have highlighted the need to extend traditional agriculture-focused SI to LSUS and establish a clear quantitative evaluation framework for SI; (2) SI for LSUS refers to a system state in which a specific sub-system produces its dominant functions with resource savings, reduced environmental impact, efficient function output, and stable/enhanced function provision, while sub-systems evolve in a coordinated and orderly manner; (3) The assessment framework of SI for LSUS clarifies modeling processes, suggested indicators, methods and scale hierarchy system to help policymakers identify SI priorities across scales, informing strategies to balance agricultural, socioeconomic, and ecosystem goals. This study overcomes the limitations of traditional SI, providing crucial insights for tracking SI performance and identifying barriers in LSUS to enlighten the sustainable land use and management practices.</p>