The Shanghai Innovation Fund Project "YMPU Polyurethane Cold Storage Sandwich Panel Continuous Production Line Based on PLC Intelligent Fieldbus Network Control Technology" undertaken by our company was accepted and reviewed by experts organized by the Shanghai Science and Technology Commission on October 28, 2015. This project is an enterprise research and development project carried out by Shanghai Yongming Machinery Manufacturing Co., Ltd. to meet the urgent need for my country's cold chain logistics industry to take a new step. The project is supported by Shanghai Innovation Fund. my country is a major agricultural producer and consumer of agricultural products. In recent years, the output of fresh agricultural products in my country has increased rapidly, with about 400 million tons of fresh agricultural products entering the circulation field every year, and the proportion of cold chain logistics has gradually increased. At present, the development of cold chain logistics of agricultural products in my country is still in its infancy, and a large-scale and systematic cold chain logistics system has not yet been formed. There is still a gap compared with the needs of developing modern agriculture, residents' consumption and expanding agricultural product exports. The proportion of fresh agricultural products circulated through the cold chain is still low. Most fresh agricultural products are still circulated at room temperature. This makes my country's cold chain logistics industry urgently need to take a new step. The development of the cold chain logistics industry is also conducive to the storage of fresh agricultural products, reducing waste, and helping to stabilize market demand fluctuations and avoid the situation where low grain prices hurt farmers. To reduce the total production cost of society. The huge market demand will inevitably increase the demand for polyurethane cold storage sandwich panels, which are essential and basic construction materials in "cold chain logistics", and the demand for professional equipment will also inevitably increase. To meet the market demand, a feasible and economical way is to change the current production process of polyurethane sandwich panels for cold storage, and change the currently commonly used discontinuous production method to a continuous production method. The continuous production method has a fast production speed, high output, high degree of automation, less labor, and stable product quality. Therefore, the project has a very broad market prospect.