数字孪生被视为智慧农业新的发展阶段。通过建立农业生产的物理系统和数字空间，数字孪生技术实现了“连接-感知-决策-控制”一体化，可以通过更高水平的智能控制应对农业生产系统的复杂性。我国农业数字孪生系统发展相对较晚，相关研究与技术装备整体处于探索和起步阶段。本文基于奶牛养殖多维信息采集、数据分析和生产仿真模型的研究，面向饲喂管理、繁殖管理、健康管理和环境调控等关键生产场景，建立奶牛场在虚拟空间的数字化映像，构建了奶牛养殖数字孪生系统，实现了对养殖技术流程与生产装备的数据驱动、实时反馈、模拟推演和以虚控实的智能管控，并在江苏省某千头规模奶牛场进行了具体应用和初步验证。

Digital twin has been recognized as a new development stage of smart agriculture. By establishing physical systems and digital spaces for agricultural production, digital twin technology has achieved the integration of "connection - perception - decision - control", which can address the complexity of agricultural production systems through higher levels of intelligent control. The development of China's agricultural digital twin system is relatively late, and the overall research and technical equipment are in the exploratory and initial stage. In this article, on the basis of research on multidimensional information acquisition, data analysis, and production simulation models for dairy farming, a digital image of dairy farms in virtual space is established, which is targeting key production scenarios such as feeding management, breeding management, health management, and environmental regulation, and a digital twin system for dairy farming is constructed, implementing the data-driven, real-time feedback, simulation deduction, and intelligent control through virtual control of breeding technology processes and production equipment. And the digital twin system has been conducted specific application and preliminary verification on a 1000-herd scale dairy farm in Jiangsu Province.