Disclosed is an animal, plant, fruit and vegetable freezing pretreatment method, comprising the following steps: step one, preparing a freezing pretreatment solution being prepared from 0.01 to 10 percent of freezing pretreatment assistant in mass and the balance of water and step two, magnetic field pretreatment: after removing impurities from food in need of refrigeration and fresh keeping and washing the food, soaking the food in the pre-prepared freezing pretreatment solution in 0 to 10°C, and putting the food in a low-equivalent alternating electromagnetic environment, wherein the time is 5 to 60 minutes, and the low-equivalent alternating electromagnetic environment is 10 to 5000 µT in field intensity and 15 to 30000 Hz in frequency. The freezing pretreatment assistant in the animal, plant, fruit and vegetable freezing pretreatment method is prepared from 0.02 to 6 percent of sorbitol, 0.02 to 4 percent of trehalose, and 0.02 to 4 percent of amino acid. The advantages of repeated use, shorter pretreatment time, and better quality of frozen products are obtained.
