(1) Thickened filling. Spread 10 cm mat grass on the first day, add 20 ~ 30 cm mat grass on the second day, and nail grass boards around to prevent the mat grass from scattering. When the greenhouse temperature is 10 ~ 15℃, the temperature of bedding grass can reach above 2 1℃. Mat should be replaced in time.

(2) Fire source heating. There are two heating methods: flue and charcoal stove. When heating with coal and other fuels, it is necessary to prevent fires and eliminate harmful gases in the house in time to prevent poisoning.

(3) The infrared light bulb is hung on the protective frame where the piglet is located or in the insulation room to keep the piglet warm, and the hanging height of the infrared lamp can be adjusted at any time according to the required temperature of the piglet.

(4) Using electrothermal constant temperature insulation board, the board surface temperature can reach 26 ~ 32℃, which is suitable for large pig farms.

(5) the piglet incubator is heated by far infrared. The incubator is 100 cm long, 60 cm high and 50 ~ 60 cm wide.