The tray seedlings can be completed by mechanical means in the process of filling, sowing, germination, etc. The operation is simple and fast, and is suitable for large-scale production.The seeds are evenly distributed, and the seedling rate is high, which reduces the seed cost.The seedlings in each hole in the plug are relatively independent, which not only reduces the spread of pests and diseases, but also reduces the nutritional competition between the seedlings, and the root system can also fully develop. Increase seedling density, facilitate intensive management, increase greenhouse utilization, and reduce production costs.