Multi-span greenhouses are large-scale structures formed by continuously connecting multiple single-span greenhouses (such as gable-roofed, round-arched, etc.), often sharing side walls or gutter systems to create extensive growing spaces. Characterized by scalability, modularity, and efficient environmental control, they effectively improve land utilization, reduce construction costs per unit area, and enhance the overall environmental control capabilities of the greenhouse. They are widely used in modern protected agriculture.