Feed additive for improving heat stress resistance of fattening pigs and application of feed additive

The invention provides a feed additive for improving heat stress resistance of fattening pigs and application of the feed additive, and relates to the technical field of feed additives. Every 1kg of the feed additive comprises the following components: 50 to 350g of glucose, 20 to 80g of vitamin C, 10 to 100g of vitamin E, 10 to 90g of compound vitamin B, 2 to 15g of chromium picolinate, 100 to 300g of sodium bicarbonate, 5 to 10g of potassium chloride, 100 to 300g of citric acid, 1 to 5g of selenium yeast, 1 to 9g of betaine, 100 to 400g of fat powder, 50 to 200g of compound Chinese herbal medicine and the balance of a carrier. According to the present invention, the components are compounded, such that under the heat stress condition, the daily weight gain and the food consumption of the fattening pigs can be significantly improved, the feed conversion ratio is reduced, and the heat stress resistance of the fattening pigs is improved. 本发明提供了一种提高育肥猪抗热应激能力的饲料添加剂及其应用，涉及饲料添加剂技术领域。每1kg饲料添加剂中含有的组分包括：葡萄糖50-350g、维生