An automatic blow-drying device for pets includes a pet cage and a drying unit, wherein the drying unit is arranged on one side of the pet cage and comprises an air source, air supply passages are respectively arranged on two sides of the air source and are provided with heating elements, the pet cage is provided with openings which are matched with the air supply passages to form stationary air ports, the air supply passages on the two sides are matched with the corresponding stationary air ports to allow an air flow to enter the pet cage to form a surrounding drying area, and the drying unit is connected with an adjustable air port used for blowing air into areas, except for the surrounding drying area, in the pet cage. According to the domestic automatic blow-drying device for pets, a pet can be directly placed in the device to be blow-dried after being bathed, so that the situation where water and pet hair spread all around in a house after the pet is bathed is prevented.