Bullfrogs are hypothermic animals that begin to hibernate when the water temperature drops to 6°C to 12°C. Management should pay attention to the following three points during this period: Before wintering, bullfrogs should be kept in hibernation, lurking in the bottom of the water or in the caves without food, relying on the dissolved oxygen in the skin's breathing water and the nutrients accumulated in the body to maintain a low metabolism. Therefore, we should pay close attention to promoting supper before the arrival of hibernation. Every day, we should invest in high-nutrition and more comprehensive feeds. If necessary, we can feed some fly maggots, loach, etc. to ensure that the frogs eat well, so as to accumulate hibernation. Nourishment, reduce deaths. Overwintering sites should be sheltered from burrowing in caves where the leewards are overwintering. The size of the caves to be excavated depends on the size of the farm. The diameter of the caves is generally 1.5 centimeters in diameter and is more than 1 meter deep. The cave must be wet and avoid the pool water to inundate the cave, but also set up a windshield. In addition, rodent pests should be strictly prevented throughout the hibernation period. The surface of the pond should be kept 2 centimeters of water during the whole wintering period of the bullfrog, and a frost protection should be provided on the water surface. That is, a semi-circular scaffold is made of bamboo on the top of the pool, covered with grasshoppers or films. When the temperature is above 6°C, the film should be partially opened in order to ventilate and regulate the temperature to ensure that the bullfrog normally overwinters. China Agricultural Network Editor