Multi-span greenhouse with exhaust windows

The utility model relates to a multi-span greenhouse with exhaust windows, which belongs to the field of agricultural facilities and comprises a plurality of greenhouse bodies and connecting mechanisms arranged between two adjacent greenhouse bodies, each connecting mechanism comprises a plurality of connecting rods extending outwards from a support frame and a ventilation box connected with two oppositely arranged connecting rods, each ventilation box is of a hollow structure, and the exhaust windows are arranged in the ventilation boxes. The bottom faces of the ventilation boxes are communicated with the two adjacent greenhouse bodies, a plurality of ventilation windows are arranged on the side faces of the ventilation boxes, and gauze elements are embedded in the ventilation windows. According to the multi-span greenhouse, the ventilation boxes are arranged at the joints of the multi-span greenhouse, ventilation of the multi-span greenhouse is achieved, the functions of rain sheltering, flow guiding and th