Dry ice has extremely broad range of applications in cleaning of casting molds, tire molds, the food industry, aviation and printing industries, cooling and refrigeration for food and medicine, and stage effects-building. Dry ice is prepared from carbon dioxide. Several sets of dry ice production line have been established, and the purity of the product is very high and quality is very good . Our dry ice production technology is of low production costs and of high degree of automation. Dry ice gas in the production can be recycled and reused, which greatly reduce the production cost.