A method for extracting nucleic acid from animal tissue comprises the steps that 1, an animal tissue sample and a nucleic acid extracting solution are added into a bubbling bed container, the nucleic acid extracting solution comprises magnetic microspheres capable of absorbing the nucleic acid, and the bottom of the bubbling bed container is provided with a microwell plate and an air inlet; 2, nitrogen or inert gas is fed into the bubbling bed container from the air inlet to make the animal tissue sample fully mixed and reacted with the nucleic acid extracting solution, and separated nucleic acid is absorbed by the magnetic microspheres. By means of the method for extracting the nucleic acid from the animal tissue, rapid dissociation can be conducted on the animal tissue, the nucleic acid can be efficiently separated and purified, and the method for extracting the nucleic acid from the animal tissue can be widely applied to the field of animal epidemic disease detection.