In order to address the requirements for refined management and flexible production in ammunition assembly line, this paper proposes a construction method for a production management and control system based on digital twin technology. First, high-fidelity 3D models based on kinematic hierarchy constraints were established. By utilizing data-driven animation technology, millisecond-level real-time mapping between the physical and virtual spaces was achieved. Addressing the limitations of traditional monitoring mode, the study focused on developing digital twin control applications and constructed a "video-sensor fusion" monitoring mode. This mode performs spatial registration and fused display of 2D video streams and 3D sensor data. Application results indicate that the system achieves transparent and intelligent control over all production elements, providing robust technical support for scientific decision-making in complex ammunition assembly processes.