Abstract: An animal protection device, comprising: a main body and a plurality of elastic fixing belts. In the animal protection device, the plurality of support rods are inserted into the corresponding insertion bags of the main body. Through the support of the support rods, the knee joint is kept from easy to slip. In addition, a plurality of fixing belts are provided on both sides of the main body. As such, when the animal protection device is installed on the leg of the animal, the fixing belts are wound around the rear of animal's knee in opposite directions, to connect them onto the main body through the connection portions, so that the animal protection device can be wrapped around the animal's leg tightly, to relieve the pains of the animal when it is walking or kneeling.