The circulating movement seedling bed is set up in the greenhouse, which is composed of a frame, a chain sprocket transmission device and a tensioning device arranged in the shape of "W", a driving device, a chain guide device, a seedling tray hanging basket, an environmental control device, a spray (for humidification, cooling, foliar fertilization, and insecticide) device, an LED special plant light system, an intelligent electronic control system (including temperature, humidity, light, gas, fertilizer, etc.), maintenance escalators and platforms, etc.The driving end is designed with the hanging basket reversing loading and unloading operation platform, driven by the frequency conversion power, the seedling tray of sowing seeds is installed in the seedling tray hanging basket in an orderly manner, the hanging basket of the seedling tray is lifted with the following sprocket and chain in turn, and when it is lifted to the top, it is changed to downward through the upper sprocket, with the sprocket, chain and the seedling tray hanging basket arranged at a certain distance to form a number of "W" shapes to move forward in turn, and when it reaches the end of the equipment, it changes to the horizontal return surface with the lower reversing sprocket, and the chain moves in a straight line with the guide small sprocket in the horizontal section, Ensure the safe and stable operation of the haulm tray basket back to the loading and unloading operation end.Under the action of power drive, the seedling tray hanging basket runs in a circulating "W" type in the seedling bed. The "W" type circulating movement seedling bed is based on the agronomic technology process of seedling raising and seedlings, giving full play to the role of three-dimensional space, using the "W" type of seedling tray arrangement combined with the chain circulation mode to ensure and transform the lighting, through the software and hardware facilities to assist in ensuring the environmental conditions of crop cultivation such as ventilation and light, temperature and humidity, etc., can use different crop seedling programmatic special control technology to meet the growth environment of different crops and automatically complete the seedling raising, so as to ensure the safety of seedlings, reduce labor intensity and improve production efficiency