Plastic shed, commonly known as cold shed, is a simple and practical protective cultivation facility. With the development of plastic industry, it has been widely used all over the world because of its simple construction, convenient use and low investment. Using bamboo, steel and other materials, covering with plastic film, building arched greenhouses to cultivate vegetables can advance or postpone the supply, improve the output per unit area, and help to defend against natural disasters, especially in the northern region, where fresh and tender vegetables can be supplied in early spring, late autumn and off-season.

Plastic greenhouse makes full use of solar energy, which has a certain thermal insulation effect. The temperature and humidity in the greenhouse can be adjusted within a certain range by rolling the film. Therefore, in the northern part of China, plastic greenhouses mainly play the role of heat preservation cultivation in early spring sowing and late autumn sowing. Generally, it can be advanced by 30-35 days in spring and delayed by 20-25 days in autumn, but overwintering cultivation cannot be carried out. In southern China, plastic greenhouses are not only used for the cultivation of vegetables and flowers in winter and spring, but also for shading and cooling in summer and autumn, as well as rain-proof, wind-proof and hail-proof facilities.

China has a vast territory and a complicated climate. Using plastic greenhouse to cultivate vegetables, flowers and other facilities has played a special and important role in alleviating the contradiction between supply and demand of vegetables in off-season, and has remarkable social and huge economic benefits.