The invention provides a greenhouse door-window damping device which comprises a horizontal beam and a damping body. The horizontal beam is in a reverse-T shape. The damping body is in a square ring shape. A vertical beam is arranged on the horizontal beam. The damping body is connected with the vertical beam on the horizontal beam. The horizontal beam and the damping body are made of elastic materials. According to the technical scheme, the whole greenhouse door-window damping device has the advantages of being simple in structure, materials are saved, cost is low, the hollow structure of the damping body enhances the anti-collision and damping effect of the greenhouse door-window damping device, meanwhile great sealing sound insulation effect is achieved, operation is convenient, the structure is simple, maintaining is convenient, and machining cost is low.