The simple multi-span greenhouse is a kind of upgrade of the simple greenhouse. In fact, it is a kind of super-large greenhouse, where the original single-room greenhouse, with scientific means, reasonable design, excellent materials to the original stand-alone mode of greenhouse connected. Or as an extension. The simple multi-span greenhouses constructed are of circular arch design, simple structure, thin film covering around and on top, overall beautiful, even lighting, all-steel-tube greenhouses framework, strong and durable, and long service life, the greenhouse has high utilization rate and large operation space. Simple multi-span greenhouse advantages: 1, use of space: compared with the traditional greenhouse, in the form of multi-span greenhouses, greenhouses than the traditional use of space is a bright spot, its use area is much larger than the traditional greenhouse. 2. Management: more unified than traditional greenhouse, more scientific operation, save time and improve efficiency. Multi-span greenhouse is a kind of economic greenhouse, which is popular with users for its beautiful curve and low cost. The arc-shaped room top is beautiful and generous, the line of sight is smooth. Small amount of structural steel, good heat preservation performance. The manufacturing cost is relatively low, belongs to the economical greenhouse, applies in our country most regions.