The construction technology of vegetable greenhouse is suitable for the southeast coastal areas of China. Vegetable greenhouses are generally plastic greenhouses with various forms, which can be divided into bamboo greenhouses and steel pipe greenhouses according to the skeleton materials. According to the number of greenhouses, it can be divided into single greenhouse and multi-span greenhouse. At present, most farmers build bamboo greenhouses, which are 5-6 yuan per square meter, but the strength is poor, and the service life is only about 2 years, which has the disadvantages of weak disaster resistance and inconvenient operation and management. The multi-span greenhouse made of steel pipes has high strength (life span is as long as 15 years) and strong disaster resistance (generally it can resist 10 typhoon); The shed is high, with good ventilation and lighting conditions, high land utilization rate and convenient operation and management, but the cost is high (more than 80 yuan per square meter), which farmers and general enterprises cannot afford. A single steel tube greenhouse not only has the advantages of multi-span greenhouses, but also has a much lower cost, with the price of 25-30 yuan /m2. Farmers can consider using this instead of bamboo shed. The ancients said that "there is no meat for three days, and Japanese food is indispensable." Vegetables are indispensable food in people's lives, because they contain many nutrients and are the main source of inorganic salts and vitamins, especially in the case of lack of milk and fruit in the diet. Vegetables can generally be divided into four categories: leafy vegetables, roots, melons and eggplant, and fresh beans. Root vegetables mainly include carrots, white radishes, potatoes, lotus roots, yams, sweet potatoes, onions, garlic, bamboo shoots, taro and so on. This kind of vegetables are mainly starch with high sugar content, such as carrots, sweet potatoes, taro, potatoes and yam. , can partially replace the staple food. Other nutrients are different, such as carrots containing iodine, bromine and amylase; Potatoes contain potassium salt and vitamin c; Garlic contains a variety of inorganic salts, and carrots contain high carotene. Cucumber and eggplant vegetables mainly include wax gourd, loofah, pumpkin, bitter gourd, cucumber, wax gourd, tomato, eggplant and pepper. This vegetable contains more carbohydrates, vitamin C and carotene. The content of vitamin C in tomatoes is quite rich. Luffa contains a lot of mucus and citrulline; Pumpkin contains citrulline and arginine; Bitter gourd contains momordicin, S- hydroxytryptamine and various amino acids. Eggplant is particularly rich in vitamin P, and fresh bean vegetables mainly include edamame, lentil, broad bean, broad bean, mung bean, pea and cowpea. These vegetables contain more plant proteins, carbohydrates, vitamins and inorganic salts than other vegetables. The content of vitamin B is high, and the content of vitamin B is the most. Leafy vegetables, especially dark green vegetables, such as spinach, leek and celery, have the highest nutritional value. It mainly contains vitamin C, vitamin B and carotene, and contains more folic acid and choline. It is rich in inorganic salts, especially iron and magnesium. It can be seen that vegetables play an important role in our life. It is your unique vision to seize this opportunity. In order to let you better master the seedling facilities and equipment, seedling substrate and nutrition formula, seed vigor and seed treatment, seedling environment and control, seedling physiology and seedling raising, seedling grafting technology, plug seedling raising technology of main vegetables and seedling pest control. The significance, prospect and industrialization of vegetable industrialized seedling raising were expounded.