The invention provides a method of 
fumigation treatment on a breading house of scatter-fed black pigs, and relates to the field of black 
pig breeding. The method comprises the steps that 25 parts by 
dry weight of asiatic wormwood, 3 parts by 
dry weight of radix gentianae, 5 parts by weight of radix angelicae dahuricae stems, 15 parts by weight of 
charcoal, 5-8 parts of 
loess which are dried in the sun are selected to be made into a fuel composition, the fuel composition is put into a fire pan and lighted to be fumigated by being put into a 
cave, when 
fumigation is conducted, the opening of the 
cave is sealed, the fire pan is connected with a 
rope which leads to the outside of the 
cave, the fire pan is made to move forwards by 20-30 cm by pulling the 
rope every five minutes, and the fire pan only needs to move to the cave for one time. The 
fumigation is conducted on the interior of the cave through hot 
flue gas produced by the fuel composition in the fire pan, germs on the surface of the cave or 5 cm deep inside the soil can be killed, mice and ants can be expelled, and the mice and the ants are prevented from opening a cavity to make a 
nest near the cave. For the black pigs in the cave, the functions of clearing heat, eliminating dampness and purging liver and 
gall fire are achieved, and dampness and chilliness are prevented from entering the bodies of the black pigs.