Vegetable greenhouse drainage device

The utility model relates to the technical field of greenhouse drainage and irrigation, and discloses a vegetable greenhouse drainage device which comprises a bearing plate, flow dividing pipes and atomizing nozzles, the top of the bearing plate is connected with the flow dividing pipes at equal intervals in a penetrating mode, and the atomizing nozzles are fixedly installed at the bottoms of the peripheries of the flow dividing pipes at equal intervals; the inner cavity of the liquid containing tank is divided into the two liquid containing cavities through the partition plate in the middle of the liquid containing tank, and vegetable nutrient solution or irrigation water and blended pesticide can be poured into the two divided cavity liquid containing tanks respectively. A nutrient solution or irrigation drainage and blended insecticidal pesticide in the cavities on the two sides of the liquid containing tank are controlled through the Y-shaped flow collecting pipe and the control valves respectively and pu