The biological ice bag can be directly placed in a cold storage or refrigerator for use after freezing, without the need for further water injection, water absorption, and other steps, making it more efficient and simple. Suitable for cold and fresh transportation of aquatic products, sea insects, seafood, meat, dairy products, beverages, vaccines, reagents, household products, flowers, solder paste, etc. Generally, it is used together with foam boxes or special cold chain boxes to achieve the effect of refrigerated transportation.