The Russia-Ukraine war has demonstrated that traditional land combat systems have suffered heavy losses on the battlefield and are difficult to achieve the operational objective of seizing territory. In the future of land warfare, unmanned land combat systems based on the mosaic warfare concept will fully leverage the advantages of land unmanned combat systems and artificial intelligence, and possess features such as functional decomposition, distributed deployment, and cost-effectiveness. They will become the transformation and development direction of future land combat systems. This paper, guided by the mosaic warfare concept, employs a systematic structural design approach to explore and analyze the system architecture of future land unmanned combat systems, aiming to provide reference value for the transformation and development of future land combat systems.