Abstract: Mechanized seedling production system is called Plug Production System or Speedling System in western countries, such techniculture system has been quickly progressed in recent years in the whole world. This is reflected in fact that 70 percent Vegetable transplants is plug plants fo be.adopted in u.S.The main equipment of mechanized seedling growing system is the precision sowing line The seed is covered with peat and vermiculite.Peat and vermiculite are the good plug seedling growing medium. The system provides several advantages. They are not found in current blockraise seedling and bare root seedling processes. Time to grow the crop and labor to transplant are both reduced by sowing the seed in the plug tray. Plug seedlings will grow 100% very uniform plants.Mechanized seedling production system of vegetable crops has just started in china. Huaxiang nursery is the firs tone to provide the plug seedlings on the market in china. Huaxiang nursery delivered more than s million plug seedlings to vegetable farmers in 1990. As the Chinese grower desire a slightly large plants, tomatoes and eggplants mostly are sown in 72 cell per tray, peppers and cabbages are sown in 128 cell, celery is sown in 200 cell. The plug plants had become an accepted practice by the Beijing vegetable growers. Althongh some of the customers complain that the seedlings are a little small.