Improvement facilities The dripping film must be exposed at a certain angle and without obstructions, so that the dew can flow smoothly along the film surface without falling on the crop. Therefore, we should reasonably increase the ratio of high spans, appropriately reduce the distance between arches, and maintain a certain distance between the drawbars or cables to ensure smooth flow. The surface treatment of the skeleton material has the function of continuous coverage of the service life of 12 to 24 months. If the framework of the scaffold is not handled properly, especially when the arch rod is rough and barbed, it is easy to destroy the film, which seriously affects the service life and heat preservation effect. Therefore, it is necessary to smooth the surface of the framework material of the greenhouse. For the steel skeleton to be rust-proof. Anti-rust treatment is best to use hot-dip galvanized or painted silver powder. It is not appropriate to paint or wrap the used film on the skeleton to prevent it from tearing. In addition, it is not advisable to use winder wounds such as grass ropes on the arch rods so as not to affect the dripability. Due to insufficient width of the weather-resistant functional film and the need for ventilation, welding techniques should be used for welding with irons. The overlapping part of heat sealing should be controlled over 30mm to avoid affecting the welding firmness. Button technology Three-layer co-extruded weathering functional film, polyvinyl chloride dust and weatherproof film are divided into inside and outside, should pay attention to the manufacturer's internal and external direction of the buckle film. The membrane operation should be performed at noon on a sunny and windless day. When the film is buckled, it should be flattened, tight, and firmly clamped to prevent wrinkles from affecting the drip effect. Longitudinal framework material cannot come into contact with the membrane. In addition, the weather-resistant functional film is effectively used for a long period of time. It is not suitable to use a bamboo stick and a wire to penetrate through the film to bind and fix the weather-resistant functional film. Instead, it should be fixed by a lamination line. Water management technology should cover the mulch in low temperature and low light seasons, and adopt under-membrane dark irrigation or drip irrigation to eliminate drip irrigation to reduce fog and extend the effective duration of dripping. In addition, the weather-resistant functional film is light-transmitting and has a rapid temperature rise. It is necessary to pay attention to the timely release of air, especially the ethylene-vinyl acetate weatherproof functional film, in order to avoid high-temperature hazards. When pesticide technology uses pesticides containing sulfur and iron elements, care should be taken not to spray them on the membrane so as not to affect the service life. Treatment of cracks, accumulated rain (snow) and dust occurs during the use of the film and should be repaired in time to avoid wind damage, affecting the service life and suffering freezing damage. During the use of the weather-resistant functional film, there is a tendency for the surface dust to increase, affecting light transmission, and care should be taken to scrub it. In order to protect the film, rainwater pockets and snow will be removed in time. Comprehensive use of weather-resistant functional membranes with poor performance after 12 to 24 months of continuous coverage, and low mechanical strength, should be removed from greenhouses, solar greenhouses for internal insulation coverage or cover sheds. After covering a small shed, it can generally be used to cover wintering vegetables such as spinach or used as a ground film. Waste films that cannot continue to be covered should be collected and recycled to waste collection stations or related companies to prevent white pollution.