Abnormal climate change in spring, large temperature difference between day and night, early morning and evening temperatures are low. If the brooding temperature is too low, broilers are susceptible to cold and cause diarrhea or respiratory diseases; meat brooding tends to cause crowding in order to heat and squeezing, affecting feeding and activities, resulting in disability, and in severe cases can cause a large number of deaths. Therefore, many farmers have recently asked the broiler house to warm and keep warm. Heating and heat preservation measures for broiler brooding include: First, timely maintenance and maintenance of the chicken house, the roof and the four walls of the gap in time plugging with fillers, and to prevent the thieves wind, cross the wind to attack the flock, repair the damaged windows in a timely manner, and use plastic sheeting or straw curtains will doors and windows Cover and reduce the loss of heat from the wall. Second, thicker sheds laid in the shed, litter should be fresh, dry, soft, easy to mold, good water absorption, laying thickness to 10 cm is appropriate. Third, the use of diligence and diligence. Never let a chicken lie on a damp mat, and at the same time conditionally replace the moist litter. Plastic canopies can also be used to build a simple ceiling in a chicken house to form a thermal insulation layer to reduce the loss of heat from the roof. Or at a distance of 2 meters from the ground, cross the bamboo poles and cover with straw or plastic sheeting to facilitate insulation. Fourth, install warming appliances 1. Install the thermostat. The use of a thermostat to control the temperature and ventilation of the house allows for minimum ventilation management. This not only allows the temperature of the house to meet the normal growth and development needs of the chicken, but also saves coal and reduces the stress of the cold on the bird body. 2. Install the air duct. On the two sides of the chicken house, a vertical air duct with a diameter of 16-18 cm and a length of 3.5-4 meters is installed every 4 meters along the vertical wall. It is installed along the ceiling. Lightweight materials such as plastic, polyvinyl chloride and fiberglass are available. It facilitates minimum ventilation control and reduces the stress response in chickens. 3. Heater heating. Among all the heating methods, the heat efficiency of the warm air heater is the highest, and the temperature rise is fast, which can satisfy the need of the chicken house temperature to the maximum. The temperature difference between the exhaust gas discharged from the winter house and the supplemented fresh air is relatively large, and the residual heat of the exhaust gas has a certain utilization value. Therefore, in order to solve the contradiction between ventilation and ventilation, it is possible to use the waste heat heater in the exhaust gas to reduce the energy waste and improve the breeding efficiency. 4. Promote halyards. If furnace heating is used, the length of the cycle of the chimney in the house should be extended as much as possible so that the heat generated by the coal combustion can be distributed in the chicken house as much as possible to reduce the waste of heat energy and the smoke outlet should not touch the heat. The length of a typical chimney is about 20 meters. 5. Build a heat preservation shed. At present, some farmers have built a plastic film insulation shed on the front and back walls of the chicken house, using solar energy to supply heat, which not only absorbs the heat of the sun, but also reduces the heat loss of the chicken house, and can save energy by about 1/3. At the same time, avoid cold wind blowing directly into the house causing cold stress.