目的 了解长沙市某县牛价值链各环节总体状况，分析链条中疫病传播风险点，助力动物疫病防控工作稳步推进。 方法 通过问卷调查、实地走访与座谈交流等方式，对长沙市某县12个乡镇（街道）的128家养殖场（户）、19名贩运经纪人、2个交易市场、21个交易摊户、8个屠宰摊户和1个无害化处理中心进行调查。 结果 全县养殖环节规模化程度低，饲养模式以自繁自养为主；调运环节来源广泛，存在布鲁氏菌病高风险区域活牛进入养殖环节的情况；贩运经纪人行为复杂，体现在销售对象多样、兼营其他相关业务等；集中屠宰率低，屠宰人员防护意识较差；牛价值链各环节存在不同程度的动物疫病风险。 结论 建议进一步提高从业人员防护意识、提高养殖场（户）生物安全防护水平、加大检疫监督力度、加强监测排查等，不断提升综合防控水平。

Objectives The overall situation of cattle value chain in a county of Changsha city was investigated and the risk factors and behaviors of disease transmission in the chain were analyzed to assist in steadily promoting the prevention and control of animal diseases. Methods A survey was conducted on 128 farms (households), 19 transport brokers, 2 trading markets, 21 trading vendors, 8 slaughter vendors, and 1 harmless treatment center in 12 townships (streets) of a county in Changsha city with questionnaire surveys, on-site visits, and discussions. Results The scale of farming cattle in the entire county was low, and the cattle was mainly bred and raised by the farms/households themselves. The transportation process came from a wide range of sources, with live cattle from the regions at high risk of brucellosis entering the process of farming. The behavior of transport brokers was complex, reflected in the diversity of supply channels and the concurrent operation of other related businesses. The centralized slaughter rate was low, and the protective awareness of slaughter personnel was poor. There were varying degrees of animal disease risks in each link of the cattle value chain. Conclusions It is recommended to further enhance the protective awareness of practitioners, improve the level of bio-safety protection in farms (households), increase quarantine supervision, strengthen monitoring and investigation, and continuously improve the level of comprehensive prevention and control.