There are two aspects in the development of multi-span greenhouses: first, there is blindness in expanding the area of solar greenhouse, which wastes funds and has low efficiency; Second, the type, structure and application of solar greenhouse tend to be the same. At present, the development of solar greenhouse should be based on the stability of the area, increase the connotation, to benefit direction. To select the appropriate greenhouse type, structure and supporting equipment according to the use, that is, according to the use and production needs, the construction of solar greenhouse of different sizes, specifications and grades, strive for economy, modernization and higher efficiency.

  Less able to withstand natural disasters and adversity. The problems in the production of fruits and vegetables in winter are the effects of sub-low temperature, chilling injury and freezing injury, and the indoor temperature in summer is on the high side. This not only reduced the output and quality of vegetables, but also related to the stability of production. The countermeasures to be taken are: fixed or temporary heating equipment should be available in the production of solar greenhouses all year round, and cooling measures should be taken in summer. Another kind of disaster is the harm of diseases and insect pests. Modern integrated management and prevention technologies are needed to focus on prevention, strengthen monitoring and reduce disasters to a lower level. In the aspect of pest control and prevention, it is necessary to change from double control to three-way control

 The modern cultivation system for vegetable production in multi-span greenhouses has not been established yet. The establishment of modern cultivation system in solar greenhouse should be based on the rational use of land and nutrients, which is beneficial to the control of diseases and pests and the prevention of soil continuous cropping obstacles, so as to realize the marketing management of modern vegetables. Change the current continuous cropping system, carry out reasonable large rotation cropping (vegetable rotation in greenhouse) , change the random selection of the type of cutting cultivation of vegetables, combine the advantages of environment, resources and region, carry out systematic planting, the current harvesting and cultivation system can be changed according to the market demand, but temporary benefits can not be obtained at the expense of the sustainable development of greenhouses.Without standardized, standardized greenhouse management and cultivation technology, it is impossible to achieve optimal management. This is one of the fundamental differences in technology between modern agriculture and experiential agriculture. As soon as standardization is mentioned, it involves the automatic control of the greenhouse environment. In fact, automatic control is a means of greenhouse environment control. According to production needs, design, production specifications of multi-span greenhouse construction, cutting, cultivation technology needs standardization, a clear environmental control standards; The method of reaching the standard can be automatically controlled by abdominal factors, automatically controlled by single factors or manually controlled according to the needs and possibilities of production, the key is to have standardized awareness, standardized technical system and relatively easy to operate control methods.