The utility model discloses a tobacco seedling growing greenhouse intelligent irrigation function executive device and belongs to the technical field of tobacco production. The tobacco seedling growing greenhouse intelligent irrigation function executive device comprises an electromagnetic valve, a manual ball valve, a filter and a conduit. The electromagnetic valve, the manual ball valve and the filter are installed on the conduit, and the filter is installed in front of the electromagnetic valve and connected with the electromagnetic valve in series. The manual ball valve is connected with the filter and the electromagnetic valve in parallel. The electromagnetic valve, the manual ball valve and the filter are connected through the conduit, and the electromagnetic valve is connected with a control host machine through a power line. The electromagnetic valve is a basic assembler program (BAP) 0104 submersible electromagnetic valve. The filter is a straight-through type back flush filter. The tobacco seedling growing greenhouse intelligent irrigation function executive device is reasonable in design, capable of achieving intelligent irrigation of a tobacco seedling growing greenhouse with a manual method and an automatic method combined, suitable for areas where tobacco planting areas are large and seedling growing is concentrated and beneficial for optimizing seedling growing environments, improving tobacco seedling growing quality and promoting modernization process of tobacco production.