Large-scale trawling processing vessels are vessels that catch fish by trawling, and have large freezing and processing capabilities.There are production lines for freezing and processing on board. Fish caught by trawlers are processed into different types of products, including fillets, HG, surimi, roe, fish meal, fish oil, etc., which are frozen and stored in the ship's cold storage.A stable and reliable freezing processing line system is the guarantee of its production efficiency, and a good refrigeration system provides a guarantee for product quality.