在病原菌、病毒、应激等因素的影响下，畜禽肠道功能容易紊乱失调。抗生素可以预防或治疗由病原菌引起的感染，但抗生素的滥用会给畜牧产品、生态环境带来一系列危害，对人类的健康造成巨大威胁，因此无抗养殖的趋势已成必然。益生菌在畜禽养殖中具有很重要的作用，乳酸菌作为益生菌的重要组成部分，它具有促进机体生长、改善胃肠道功能、提高机体免疫力、维持动物肠道菌群平衡等作用，故乳酸菌可以作为抗生素替代品引入畜禽养殖。本文主要概述乳酸菌在畜禽养殖中发挥益生功效的作用机制和应用范围，着重讲述乳酸菌相较于其他主要畜禽养殖益生菌的优势与劣势，阐述乳酸菌在种养结合的运用，对乳酸菌的未来发展和应用前景提出展望。

Under the influence of pathogens, viruses, stress and other factors, it is easy to cause the intestinal dysfunction of livestock and poultry. Antibiotics can prevent or treat infections caused by pathogenic bacteria, whereas the abuse of antibiotics will bring a series of hazards to the livestock products and environment, which are a huge threat to human health. Therefore, raising livestock withoust using antibiotics  inevitable  becomes a trend. Probiotics play an important role in livestock and poultry breeding(LPB).Lactic acid bacteria(LAB)are a vital part of probiotics. It promotes the growth of the body, the function of the gastrointestinal tract, the immunity of the body, and maintains the balance of the intestinal flora of the animal. Hence, LAB can be used as an alternative to antibiotics in LPB. This paper mainly summarizes the mechanism and application range of LAB in probiotics in LPB, and emphasizes the advantages and disadvantages of LAB compared with other major probiotics in LPB, and expounds application of LAB in the combination model of plantingand cultivation，and provides the prospects for the future development of LAB.