Multi-layer circulating mechanical equipment and seedling culture method for culturing tobacco seedlings by using multi-layer circulating mechanical equipment

The invention belongs to the technical field of seedling culture, and provides multi-layer circulating mechanical equipment and a seedling culture method for culturing tobacco seedlings by using the multi-layer circulating mechanical equipment. The multi-layer circulating mechanical device comprises a multi-layer circulating seedling raising machine, warming equipment, light supplementing equipment, liquid spraying equipment and heat preservation equipment. When the multi-layer circulating mechanical equipment is used for culturing tobacco seedlings, the yield and the quality of the tobacco seedlings can be effectively improved, and the multi-layer circulating mechanical equipment has important significance for solving the practical problems of 'disease infection caused by unstrong tobacco seedlings, long seedling raising time and multiple leaf cutting times, low tobacco leaf yield caused by poor coordination of the length-width ratio of field tobacco leaves, low comprehensive utilization rate caused by long