Single spiral freezer, compact structure, small footprint, high freezeing effciency, large freezing output, good freezing quality, is especially suitable for products with long freezing time. The stainless steel material conveyor belt rotates spiral in the freezing room to realize the rapid freezing of the material. The cloth wind mode of top wind blowing and side wind blowing is adopted respectively, and the freezing time can range from 20 to 90 minutes.