Factory raising seedlings technology is similar for vegetables and rice to a great extent. In some developed countries, factory raising seedlings technology was researched earlier, and it has a wide application range. the Netherlands modern raising seedlings technology characterized by large-scale and professional, which is used to produce the vegetable seedlings, is a typical representative of the European. In American, the tray raising seedlings mode is adopted for celery, fresh tomato and 90% of the green peppers, some large seedlings companies, which can produce over one billion transplants annually, have mainly Speedling