The addition of sodium bicarbonate to livestock and poultry feed can effectively improve the digestibility of feed for livestock and poultry, speed up the utilization of nutrients and the discharge of harmful substances, and increase the rate of weight gain of livestock and poultry. But also the organism's immunity and immunity of livestock and poultry can be kept in the best condition all the time so as to improve the anti-stress ability of livestock and poultry and play an important role in preventing diseases of livestock and poultry and ensuring the healthy growth of livestock and poultry.