Pigs have low feed utilization and slow weight gain when the temperature rises above 35°C or falls to minus 5-10°C. The high temperature season should be based on different types of pigs and different physiological stages of the pig to give different feeding and management. Boars: Feed twice a day. Feed green feed or thinner at noon. Breeding and sports are performed in the morning and evening. Don't spray water or spray cool water immediately after breeding. From 1 pm to 3 pm every day, water is sprayed on the pig body and the ground, and the light is reduced to 8-10 hours. If the number of breedings is small, the feed amount of the concentrate should be reduced to prevent over-fertilization and poor libido. Pregnant sows: Avoid breeding in the hot season, sows in the pre-pregnancy (0-84 days) should be dominated by green coarse materials, with appropriate concentrates, to reduce the stocking density, raising 2-3 heads per round. In the second trimester of pregnancy and during the lactation period, the pig should concentrate on the raw material to match the green material. The coarse material can be fed without feeding, and the feed can be fed 3 times a day. Add 1-1.5% baking soda, 0.3% salt. Prenatal sows: The summer delivery room should be equipped with a litter bar with good ventilation and shade facilities. The production mothers should reduce their concentrates 2-3 days before delivery, and feed more green materials. The ratio of bran in the concentrates should be increased to prevent constipation in the bowels. 1. To prevent dystocia, 2. To avoid causing no postpartum feeding or lack of milk. After feeding, feed bran warm salt water once. Commodity big pig: difficult to raise in high temperature season, often appear inverted not eating, affecting growth. Generally, fat pigs are sold before the high temperature season. If they are not for sale, the stocking density should be reduced, and a few heads per lap should be kept. Each pig occupies a circle area of ​​1-1.2 square meters. Water spray cooling, feed sooner or later, at noon plus green feed or thin material, the material plus sodium bicarbonate 1.5%, salt 0.3%. Suckling piglets and piglets: hi lying on the wet ground, pay attention to changes in the weather to prevent cold pulling or diarrhea. Keep the dough dry, clean drinking water, often disinfected. Prevention can be used per kilogram of material plus 120 milligrams of oxytetracycline for several days and several days of treatment, with oxytetracycline 200 milligrams per kilogram. Heat Stroke Prevention: First, move the affected pigs to a cool, ventilated place and spray cold water on the head and body. Cut off the tail to cut ear and blood. At the same time, take medication. The following measures can be used. 1, chlorpromazine 2-3 ml per kilogram of body weight is more than 2-6 ml, mixed intramuscular injection 3 times a day. 2, camphorsulfonic acid sodium 5-10 ml, or sodium plus 2-10 ml an intramuscular injection. 3, intravenous saline 250-500 ml, and enema with saline. 4, coma cases, available ginger juice or garlic juice nasal drops.