With the continuous improvement of building energy-saving requirements in China, the insulation performance of the system needs to meet the 65% low energy consumption and energy saving standard. At the same time, polyurethane spraying has the following advantages in the field of building energy saving: excellent heat preservation performance (thermal conductivity ≤ 0.024w / m · K, nearly twice lower than polystyrene board); good dimensional stability (< 1.5%); high porosity (≥ 95%); field spraying construction. These characteristics make the polyurethane spray foaming which is an important part of polyurethane rigid foam composite widely used in the field of building energy saving. At present, the polyurethane spraying products produced by our company have been successfully applied in the field of building energy conservation and insulation in major cities in China, such as China grain storage project, Shanghai World Expo, Yurun cold chain, Shandong Tianze cold chain and other important national facilities.